Uniaxial compression of [001]-oriented CaFe2As2 single crystals:the effects of microstructure and temperature on superelasticity Part I: Experimental observations

Sypek, John T.; Vijayan, Sriram; Bakst, Ian; Xiao, Shuyang; Kramer, Matthew J.; Canfield, Paul C.; Aindow, Mark; Weinberger, Christopher R.; Lee, Seok-Woo

doi:10.1016/j.actamat.2020.11.006

Title: Uniaxial compression of [001]-oriented CaFe₂As₂ single crystals:the effects of microstructure and temperature on superelasticity Part I: Experimental observations

Abstract

Micropillar compression experiments on [001]-oriented CaFe₂As₂ single crystals have recently revealed the existence of superelasticity with a remarkably high elastic limit of over 10%. The collapsed tetragonal phase transition, which is a uni-axial contraction process in which As-As bonds are formed across an intervening Ca-plane, is the main mechanism of superelasticity. Usually, superelasticity and the related structural transitions are affected strongly by both the microstructure and the temperature. As such, in this study, we investigated how the microstructure and temperature affect the superelasticity of [001]-oriented CaFe₂As₂ micropillars cut from solution-grown single crystals, by performing a combination of in-situ cryogenic micromechanical testing and transmission electron microscopy studies. Our results show that the microstructure of CaFe₂As₂ is influenced strongly by the crystal growth conditions and by subsequent heat treatment. The presence of Ca and As vacancies and FeAs nanoprecipitates affect the mechanical behavior significantly. In addition, the onset stress for the collapsed tetragonal transition decreases gradually as the temperature decreases. These experimental results are discussed primarily in terms of the formation of As-As bonds, which is the essential feature of this mechanism for superelasticity. Our research outcomes provide a more fundamental understanding of the superelasticity exhibited by CaFe₂As₂ under uni-axial compression.

Authors:

Sypek, John T. ^[1];

^[1];

^[2]; Xiao, Shuyang ^[1]; Kramer, Matthew J. ^[3]; Canfield, Paul C. ^[3];

^[1]; Weinberger, Christopher R. ^[2];

^[1]

Univ. of Connecticut, Storrs, CT (United States)
Colorado State Univ., Fort Collins, CO (United States)
Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

Publication Date:: Fri Nov 06 00:00:00 EST 2020

Research Org.:: Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

Sponsoring Org.:: National Aeronautics and Space Administration (NASA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE

OSTI Identifier:: 1722883

Alternate Identifier(s):: OSTI ID: 1780074

Report Number(s):: IS-J-10,368
Journal ID: ISSN 1359-6454

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: Acta Materialia

Additional Journal Information:: Journal Volume: 203; Journal ID: ISSN 1359-6454

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; superelasticity; precipitate; vacancy; CaFe2As2; micropillar compression

Citation Formats


                    Sypek, John T., Vijayan, Sriram, Bakst, Ian, Xiao, Shuyang, Kramer, Matthew J., Canfield, Paul C., Aindow, Mark, Weinberger, Christopher R., and Lee, Seok-Woo. Uniaxial compression of [001]-oriented CaFe2As2 single crystals:the effects of microstructure and temperature on superelasticity Part I: Experimental observations.  United States: N. p., 2020. 
Web.  doi:10.1016/j.actamat.2020.11.006.

Copy to clipboard


                    Sypek, John T., Vijayan, Sriram, Bakst, Ian, Xiao, Shuyang, Kramer, Matthew J., Canfield, Paul C., Aindow, Mark, Weinberger, Christopher R., & Lee, Seok-Woo. Uniaxial compression of [001]-oriented CaFe2As2 single crystals:the effects of microstructure and temperature on superelasticity Part I: Experimental observations.  United States.  https://doi.org/10.1016/j.actamat.2020.11.006

Copy to clipboard


                    Sypek, John T., Vijayan, Sriram, Bakst, Ian, Xiao, Shuyang, Kramer, Matthew J., Canfield, Paul C., Aindow, Mark, Weinberger, Christopher R., and Lee, Seok-Woo. Fri .  
"Uniaxial compression of [001]-oriented CaFe2As2 single crystals:the effects of microstructure and temperature on superelasticity Part I: Experimental observations".  United States.  https://doi.org/10.1016/j.actamat.2020.11.006.  https://www.osti.gov/servlets/purl/1722883.

Copy to clipboard


                    
@article{osti_1722883,

  title        = {Uniaxial compression of [001]-oriented CaFe2As2 single crystals:the effects of microstructure and temperature on superelasticity Part I: Experimental observations},

  author       = {Sypek, John T. and Vijayan, Sriram and Bakst, Ian and Xiao, Shuyang and Kramer, Matthew J. and Canfield, Paul C. and Aindow, Mark and Weinberger, Christopher R. and Lee, Seok-Woo},

  abstractNote = {Micropillar compression experiments on [001]-oriented CaFe2As2 single crystals have recently revealed the existence of superelasticity with a remarkably high elastic limit of over 10%. The collapsed tetragonal phase transition, which is a uni-axial contraction process in which As-As bonds are formed across an intervening Ca-plane, is the main mechanism of superelasticity. Usually, superelasticity and the related structural transitions are affected strongly by both the microstructure and the temperature. As such, in this study, we investigated how the microstructure and temperature affect the superelasticity of [001]-oriented CaFe2As2 micropillars cut from solution-grown single crystals, by performing a combination of in-situ cryogenic micromechanical testing and transmission electron microscopy studies. Our results show that the microstructure of CaFe2As2 is influenced strongly by the crystal growth conditions and by subsequent heat treatment. The presence of Ca and As vacancies and FeAs nanoprecipitates affect the mechanical behavior significantly. In addition, the onset stress for the collapsed tetragonal transition decreases gradually as the temperature decreases. These experimental results are discussed primarily in terms of the formation of As-As bonds, which is the essential feature of this mechanism for superelasticity. Our research outcomes provide a more fundamental understanding of the superelasticity exhibited by CaFe2As2 under uni-axial compression.},

  doi          = {10.1016/j.actamat.2020.11.006},

  journal      = {Acta Materialia},

  number       = ,

  volume       = 203,

  place        = {United States},

  year         = {Fri Nov 06 00:00:00 EST 2020},

  month        = {Fri Nov 06 00:00:00 EST 2020}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (Publisher)

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1016/j.actamat.2020.11.006

Other availability

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Ductility in Intermetallic Compounds
journal, September 2003

Russell, A. M.
Advanced Engineering Materials, Vol. 5, Issue 9
DOI: 10.1002/adem.200310074

Making and Breaking Bonds in the Solid State: The ThCr ₂ Si ₂ Structure
journal, September 1985

Hoffmann, Roald; Zheng, Chong
The Journal of Physical Chemistry, Vol. 89, Issue 20
DOI: 10.1021/j100266a007

ThCr2Si2 structure type: The “perovskite” of intermetallics
journal, April 2019

Shatruk, Michael
Journal of Solid State Chemistry, Vol. 272
DOI: 10.1016/j.jssc.2019.02.012

Superconductivity in the iron selenide $K_{x} {Fe}_{2} {Se}_{2}$ $(0 \leq x \leq 1.0)$
journal, November 2010

Guo, Jiangang; Jin, Shifeng; Wang, Gang
Physical Review B, Vol. 82, Issue 18
DOI: 10.1103/PhysRevB.82.180520

Recent advances in iron-based superconductors toward applications
journal, April 2018

Hosono, Hideo; Yamamoto, Akiyasu; Hiramatsu, Hidenori
Materials Today, Vol. 21, Issue 3
DOI: 10.1016/j.mattod.2017.09.006

Pairing Mechanism in Fe-Based Superconductors
journal, March 2012

Chubukov, Andrey
Annual Review of Condensed Matter Physics, Vol. 3, Issue 1
DOI: 10.1146/annurev-conmatphys-020911-125055

First-order structural phase transition in ${CaFe}_{2} {As}_{2}$
journal, July 2008

Ni, N.; Nandi, S.; Kreyssig, A.
Physical Review B, Vol. 78, Issue 1
DOI: 10.1103/PhysRevB.78.014523

Hydrostatic-pressure tuning of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$
journal, December 2012

Gati, E.; Köhler, S.; Guterding, D.
Physical Review B, Vol. 86, Issue 22
DOI: 10.1103/PhysRevB.86.220511

Structural, magnetic and superconducting phase transitions in CaFe2As2 under ambient and applied pressure
journal, May 2009

Canfield, P. C.; Bud’ko, S. L.; Ni, N.
Physica C: Superconductivity, Vol. 469, Issue 9-12
DOI: 10.1016/j.physc.2009.03.033

Pressure Induced Superconductivity in ${CaFe}_{2} {As}_{2}$
journal, July 2008

Torikachvili, Milton S.; Bud’ko, Sergey L.; Ni, Ni
Physical Review Letters, Vol. 101, Issue 5
DOI: 10.1103/PhysRevLett.101.057006

Unusual superconducting state at 49 K in electron-doped CaFe2As2 at ambient pressure
journal, September 2011

Lv, B.; Deng, L.; Gooch, M.
Proceedings of the National Academy of Sciences, Vol. 108, Issue 38
DOI: 10.1073/pnas.1112150108

Control of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$
journal, June 2012

Ran, S.; Bud'ko, S. L.; Straszheim, W. E.
Physical Review B, Vol. 85, Issue 22
DOI: 10.1103/PhysRevB.85.224528

Uniaxial versus hydrostatic pressure-induced phase transitions in CaFe $_{2}$ As $_{2}$ and BaFe $_{2}$ As $_{2}$
journal, March 2012

Tomić, Milan; Valentí, Roser; Jeschke, Harald O.
Physical Review B, Vol. 85, Issue 9
DOI: 10.1103/PhysRevB.85.094105

Sample Dimensions Influence Strength and Crystal Plasticity
journal, August 2004

Uchic, M. D.
Science, Vol. 305, Issue 5686
DOI: 10.1126/science.1098993

Size dependence of mechanical properties of gold at the micron scale in the absence of strain gradients
journal, April 2005

Greer, Julia R.; Oliver, Warren C.; Nix, William D.
Acta Materialia, Vol. 53, Issue 6
DOI: 10.1016/j.actamat.2004.12.031

Size effects in the deformation of sub-micron Au columns
journal, November 2006

Volkert, C. A.; Lilleodden, E. T.
Philosophical Magazine, Vol. 86, Issue 33-35
DOI: 10.1080/14786430600567739

Plasticity of Micrometer-Scale Single Crystals in Compression
journal, August 2009

Uchic, Michael D.; Shade, Paul A.; Dimiduk, Dennis M.
Annual Review of Materials Research, Vol. 39, Issue 1
DOI: 10.1146/annurev-matsci-082908-145422

Plasticity in small-sized metallic systems: Intrinsic versus extrinsic size effect
journal, August 2011

Greer, Julia R.; De Hosson, Jeff Th. M.
Progress in Materials Science, Vol. 56, Issue 6
DOI: 10.1016/j.pmatsci.2011.01.005

Plasticity in Confined Dimensions
journal, June 2010

Kraft, Oliver; Gruber, Patric A.; Mönig, Reiner
Annual Review of Materials Research, Vol. 40, Issue 1
DOI: 10.1146/annurev-matsci-082908-145409

Ultra-strength materials
journal, September 2010

Zhu, Ting; Li, Ju
Progress in Materials Science, Vol. 55, Issue 7
DOI: 10.1016/j.pmatsci.2010.04.001

Superelastic and micaceous deformation in the intermetallic compound CaFe2As2
journal, December 2017

Sypek, John T.; Weinberger, Christopher R.; Vijayan, Sriram
Scripta Materialia, Vol. 141
DOI: 10.1016/j.scriptamat.2017.07.008

Composition, Compatibility, and the Functional Performances of Ternary NiTiX High-Temperature Shape Memory Alloys
journal, February 2016

Bucsek, Ashley N.; Hudish, Grant A.; Bigelow, Glen S.
Shape Memory and Superelasticity, Vol. 2, Issue 1
DOI: 10.1007/s40830-016-0052-5

Composition and temperature dependence of twinning stress in non-modulated martensite of Ni-Mn-Ga-Co-Cu magnetic shape memory alloys
journal, February 2018

Soroka, A.; Sozinov, A.; Lanska, N.
Scripta Materialia, Vol. 144
DOI: 10.1016/j.scriptamat.2017.09.046

Mechanisms for phase transformation induced slip in shape memory alloy micro-crystals
journal, June 2017

Paranjape, Harshad M.; Bowers, Matthew L.; Mills, Michael J.
Acta Materialia, Vol. 132
DOI: 10.1016/j.actamat.2017.04.066

Temperature dependence and temperature limits of magnetic shape memory effect
journal, December 2003

Heczko, Oleg; Straka, Ladislav
Journal of Applied Physics, Vol. 94, Issue 11
DOI: 10.1063/1.1626800

Mechanisms of the multi-shape memory effect and temperature memory effect in shape memory polymers
journal, January 2010

Sun, Li; Huang, Wei Min
Soft Matter, Vol. 6, Issue 18
DOI: 10.1039/c0sm00236d

Stabilization of an ambient-pressure collapsed tetragonal phase in CaFe $_{2}$ As $_{2}$ and tuning of the orthorhombic-antiferromagnetic transition temperature by over 70 K via control of nanoscale precipitates
journal, April 2011

Ran, S.; Bud’ko, S. L.; Pratt, D. K.
Physical Review B, Vol. 83, Issue 14
DOI: 10.1103/PhysRevB.83.144517

Incipient plasticity during nanoindentation at elevated temperatures
journal, August 2004

Lund, Alan C.; Hodge, Andrea M.; Schuh, Christopher A.
Applied Physics Letters, Vol. 85, Issue 8
DOI: 10.1063/1.1784891

Temperature dependence of the indentation size effect
journal, July 2010

Franke, Oliver; Trenkle, Jonathan C.; Schuh, Christopher A.
Journal of Materials Research, Vol. 25, Issue 7
DOI: 10.1557/JMR.2010.0159

A Nanoindentation Study of the Plastic Deformation and Fracture Mechanisms in Single-Crystalline CaFe2As2
journal, April 2018

Frawley, Keara G.; Bakst, Ian; Sypek, John T.
JOM, Vol. 70, Issue 7
DOI: 10.1007/s11837-018-2851-y

Complex structures of different CaFe2As2 samples
journal, February 2014

Saparov, Bayrammurad; Cantoni, Claudia; Pan, Minghu
Scientific Reports, Vol. 4, Issue 1
DOI: 10.1038/srep04120

Modeling pseudo-elastic behavior in small-scale ThCr2Si2-type crystals
journal, July 2018

Bakst, Ian N.; Sypek, John T.; Neilson, James R.
Computational Materials Science, Vol. 150
DOI: 10.1016/j.commatsci.2018.03.071

Size dependence of the yield strength of fcc and bcc metallic micropillars with diameters of a few micrometers
journal, April 2012

Lee, Seok-Woo; Nix, William D.
Philosophical Magazine, Vol. 92, Issue 10
DOI: 10.1080/14786435.2011.643250

Uniaxial compression of fcc Au nanopillars on an MgO substrate: The effects of prestraining and annealing
journal, September 2009

Lee, Seok-Woo; Han, Seung Min; Nix, William D.
Acta Materialia, Vol. 57, Issue 15
DOI: 10.1016/j.actamat.2009.06.002

Thermal vacancy behavior analysis through thermal expansion, lattice parameter and elastic modulus measurements of B2-type FeAl
journal, February 2014

Zhao, Mi; Yoshimi, Kyosuke; Maruyama, Kouichi
Acta Materialia, Vol. 64
DOI: 10.1016/j.actamat.2013.10.051

Microstructure and tetragonal-to-orthorhombic phase transition of $A {Fe}_{2} {As}_{2}$ $(A = Sr, Ca)$ as seen via transmission electron microscopy
journal, February 2009

Ma, C.; Yang, H. X.; Tian, H. F.
Physical Review B, Vol. 79, Issue 6
DOI: 10.1103/PhysRevB.79.060506

Structural and physical properties of CaFe2As2
journal, May 2011

Shi, H. L.; Yang, H. X.; Tian, H. F.
Journal of Physics and Chemistry of Solids, Vol. 72, Issue 5
DOI: 10.1016/j.jpcs.2010.10.008

The formation of nanograin structures and accelerated room-temperature theta precipitation in a severely deformed Al–4wt.% Cu alloy
journal, March 2010

Huang, Y.; Robson, J. D.; Prangnell, P. B.
Acta Materialia, Vol. 58, Issue 5
DOI: 10.1016/j.actamat.2009.11.008

Structure of Age-Hardened Aluminium-Copper Alloys
journal, September 1938

Preston, G. D.
Nature, Vol. 142, Issue 3595
DOI: 10.1038/142570a0

Structure of Age-Hardened Aluminium-Copper Alloys
journal, September 1938

Guinier, AndrÉ
Nature, Vol. 142, Issue 3595
DOI: 10.1038/142569b0

A model for the growth of Guinier-Preston zones-the vacancy pump
journal, June 1965

Girifalco, L. A.; Herman, H.
Acta Metallurgica, Vol. 13, Issue 6
DOI: 10.1016/0001-6160(65)90120-3

The interaction between vacancies and zones and the kinetics of pre-precipitation in Al-rich alloys
journal, January 1962

Federighi, T.; Thomas, G.
The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics, Vol. 7, Issue 73
DOI: 10.1080/14786436208201864

Displacement fields around Guinier–Preston 1 zones in Al–Cu alloys: investigations using MD and ADF-STEM image simulations
journal, August 2018

Hamaoka, Takumi; Takeguchi, Masaki
Philosophical Magazine, Vol. 98, Issue 31
DOI: 10.1080/14786435.2018.1508899

Clustering Process of Vacancies in Quenched Aluminum
journal, February 1982

Kamigaki, Nobuo; Hashimoto, Eiji; Deguchi, Yasuhiko
Journal of the Physical Society of Japan, Vol. 51, Issue 2
DOI: 10.1143/JPSJ.51.583

Thermal expansion of CaFe $_{2}$ As $_{2}$ : Effect of cobalt doping and postgrowth thermal treatment
journal, August 2013

Bud'ko, Sergey L.; Ran, Sheng; Canfield, Paul C.
Physical Review B, Vol. 88, Issue 6
DOI: 10.1103/PhysRevB.88.064513

Modeling the temperature dependent effect of twinning on the behavior of magnesium alloy AZ31B sheet
journal, July 2007

Jain, A.; Agnew, S. R.
Materials Science and Engineering: A, Vol. 462, Issue 1-2
DOI: 10.1016/j.msea.2006.03.160

The onset of twinning in metals: a constitutive description
journal, November 2001

Meyers, M. A.; Vöhringer, O.; Lubarda, V. A.
Acta Materialia, Vol. 49, Issue 19
DOI: 10.1016/S1359-6454(01)00300-7

Energy barriers and hysteresis in martensitic phase transformations
journal, September 2009

Zhang, Zhiyong; James, Richard D.; Müller, Stefan
Acta Materialia, Vol. 57, Issue 15, p. 4332-4352
DOI: 10.1016/j.actamat.2009.05.034

Strong Coupling of the Fe-Spin State and the As-As Hybridization in Iron-Pnictide Superconductors from First-Principle Calculations
journal, January 2009

Yildirim, T.
Physical Review Letters, Vol. 102, Issue 3
DOI: 10.1103/PhysRevLett.102.037003

Similar Records in DOE PAGES and OSTI.GOV collections:

Superelasticity and cryogenic linear shape memory effects of CaFe₂As₂

Journal Article Sypek, John T. ; Yu, Hang ; Dusoe, Keith J. ; ... - Nature Communications

Shape memory materials have the ability to recover their original shape after a significant amount of deformation when they are subjected to certain stimuli, for instance, heat or magnetic fields. But, their performance is often limited by the energetics and geometry of the martensitic-austenitic phase transformation. We report a unique shape memory behavior in CaFe₂As₂, which exhibits superelasticity with over 13% recoverable strain, over 3 GPa yield strength, repeatable stress–strain response even at the micrometer scale, and cryogenic linear shape memory effects near 50 K. These properties are acheived through a reversible uni-axial phase transformation mechanism, the tetragonal/orthorhombic-to-collapsed-tetragonal phase transformation.more »« less
Cited by 18
https://doi.org/10.1038/s41467-017-01275-z

Full Text Available
Superelastic and micaceous deformation in the intermetallic compound CaFe₂As₂

Journal Article Sypek, John T. ; Weinberger, Christopher R. ; Vijayan, Sriram ; ... - Scripta Materialia

Single-crystalline intermetallic compound CaFe₂As₂ are known to exhibit both superelasticity and micaceous plasticity, but these phenomena have not been studied in detail. Here we report a study of the elastic and plastic deformation behaviors for CaFe₂As₂ single crystals grown in Sn-flux solution. The anisotropic mechanical response has been studied using micropillar compression tests performed in-situ within a scanning electron microscope. Further, these data are compared with density functional theory calculations to develop an understanding of micaceous plasticity in terms of strongly anisotropic generalized stacking fault energies. The results of this work will offer design guidelines to produce mechanically robust superelasticmore » structures.« less
Cited by 7
https://doi.org/10.1016/j.scriptamat.2017.07.008

Full Text Available
Uniaxial-strain mechanical detwinning of CaFe[subscript 2]As[subscript 2] and BaFe[subscript 2]As[subscript 2] crystals: Optical and transport study

Journal Article Tanatar, M A ; Blomberg, E C ; Kreyssig, A ; ... - Phys. Rev. B

The parent compounds of iron-arsenide superconductors, AFe{sub 2}As{sub 2} (A=Ca, Sr, Ba), undergo a tetragonal to orthorhombic structural transition at a temperature T{sub TO} in the range 135-205 K depending on the alkaline-earth element. Below T{sub TO} the free standing crystals split into equally populated structural domains, which mask intrinsic, in-plane, anisotropic properties of the materials. Here we demonstrate a way of mechanically detwinning CaFe{sub 2}As{sub 2} and BaFe{sub 2}As{sub 2}. The detwinning is nearly complete, as demonstrated by polarized light imaging and synchrotron x-ray measurements, and reversible, with twin pattern restored after strain release. Electrical resistivity measurements in themore »« less
https://doi.org/10.1103/PhysRevB.81.184508
Tetragonal To Collapsed Tetragonal Phase Transition In BaFe{sub 2}As{sub 2} and CaFe{sub 2}As{sub 2}

Journal Article Mittal, R ; Mishra, S K ; Chaplot, S L ; ... - AIP Conference Proceedings

Superconductivity in MFe{sub 2}As{sub 2} (M = Ba, Ca) compounds appears either at a critical doping level at ambient pressure or in the parent compound itself by application of pressure above a critical value. We report high pressure powder x-ray diffractions studies for these compounds at 300 K up to about 56 GPa using membrane diamond anvil cells. The measurements for BaFe{sub 2}As{sub 2} show a new tetragonal to collapsed tetragonal phase transition at about 22 GPa that remains stable upto 56 GPa. CaFe{sub 2}As{sub 2} is already known to transform to collapsed phase at 1.7 GPa at 300 K.more »« less
https://doi.org/10.1063/1.3530541
Transition to collapsed tetragonal phase in CaFe₂As₂ single crystals as seen by ⁵⁷Fe Mössbauer spectroscopy

Journal Article Bud'ko, Sergey L. ; Ma, Xiaoming ; Tomić, Milan ; ... - Physical Review B

Temperature dependent measurements of ⁵⁷Fe Mössbauer spectra on CaFe₂As₂ single crystals in the tetragonal and collapsed tetragonal phases are reported. Clear features in the temperature dependencies of the isomer shift, relative spectra area, and quadrupole splitting are observed at the transition from the tetragonal to the collapsed tetragonal phase. From the temperature dependent isomer shift and spectral area data, an average stiffening of the phonon modes in the collapsed tetragonal phase is inferred. The quadrupole splitting increases by ~25% on cooling from room temperature to ~100 K in the tetragonal phase and is only weakly temperature dependent at low temperaturesmore »« less
Cited by 14
https://doi.org/10.1103/PhysRevB.93.024516

Full Text Available

Similar Records

Title: Uniaxial compression of [001]-oriented CaFe2As2 single crystals:the effects of microstructure and temperature on superelasticity Part I: Experimental observations

Abstract

Citation Formats

Ductility in Intermetallic Compounds journal, September 2003

Making and Breaking Bonds in the Solid State: The ThCr 2 Si 2 Structure journal, September 1985

ThCr2Si2 structure type: The “perovskite” of intermetallics journal, April 2019

Superconductivity in the iron selenide K x Fe 2 Se 2 ( 0 ≤ x ≤ 1.0 ) journal, November 2010

Recent advances in iron-based superconductors toward applications journal, April 2018

Pairing Mechanism in Fe-Based Superconductors journal, March 2012

First-order structural phase transition in CaFe 2 As 2 journal, July 2008

Hydrostatic-pressure tuning of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe 1 − x Co x ) 2 As 2 journal, December 2012

Structural, magnetic and superconducting phase transitions in CaFe2As2 under ambient and applied pressure journal, May 2009

Pressure Induced Superconductivity in CaFe 2 As 2 journal, July 2008

Unusual superconducting state at 49 K in electron-doped CaFe2As2 at ambient pressure journal, September 2011

Control of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe 1 − x Co x ) 2 As 2 journal, June 2012

Uniaxial versus hydrostatic pressure-induced phase transitions in CaFe 2 As 2 and BaFe 2 As 2 journal, March 2012

Sample Dimensions Influence Strength and Crystal Plasticity journal, August 2004

Size dependence of mechanical properties of gold at the micron scale in the absence of strain gradients journal, April 2005

Size effects in the deformation of sub-micron Au columns journal, November 2006

Plasticity of Micrometer-Scale Single Crystals in Compression journal, August 2009

Plasticity in small-sized metallic systems: Intrinsic versus extrinsic size effect journal, August 2011

Plasticity in Confined Dimensions journal, June 2010

Ultra-strength materials journal, September 2010

Superelastic and micaceous deformation in the intermetallic compound CaFe2As2 journal, December 2017

Composition, Compatibility, and the Functional Performances of Ternary NiTiX High-Temperature Shape Memory Alloys journal, February 2016

Composition and temperature dependence of twinning stress in non-modulated martensite of Ni-Mn-Ga-Co-Cu magnetic shape memory alloys journal, February 2018

Mechanisms for phase transformation induced slip in shape memory alloy micro-crystals journal, June 2017

Temperature dependence and temperature limits of magnetic shape memory effect journal, December 2003

Mechanisms of the multi-shape memory effect and temperature memory effect in shape memory polymers journal, January 2010

Stabilization of an ambient-pressure collapsed tetragonal phase in CaFe 2 As 2 and tuning of the orthorhombic-antiferromagnetic transition temperature by over 70 K via control of nanoscale precipitates journal, April 2011

Incipient plasticity during nanoindentation at elevated temperatures journal, August 2004

Temperature dependence of the indentation size effect journal, July 2010

A Nanoindentation Study of the Plastic Deformation and Fracture Mechanisms in Single-Crystalline CaFe2As2 journal, April 2018

Complex structures of different CaFe2As2 samples journal, February 2014

Modeling pseudo-elastic behavior in small-scale ThCr2Si2-type crystals journal, July 2018

Size dependence of the yield strength of fcc and bcc metallic micropillars with diameters of a few micrometers journal, April 2012

Uniaxial compression of fcc Au nanopillars on an MgO substrate: The effects of prestraining and annealing journal, September 2009

Thermal vacancy behavior analysis through thermal expansion, lattice parameter and elastic modulus measurements of B2-type FeAl journal, February 2014

Microstructure and tetragonal-to-orthorhombic phase transition of A Fe 2 As 2 ( A = Sr , Ca ) as seen via transmission electron microscopy journal, February 2009

Structural and physical properties of CaFe2As2 journal, May 2011

The formation of nanograin structures and accelerated room-temperature theta precipitation in a severely deformed Al–4wt.% Cu alloy journal, March 2010

Structure of Age-Hardened Aluminium-Copper Alloys journal, September 1938

Structure of Age-Hardened Aluminium-Copper Alloys journal, September 1938

A model for the growth of Guinier-Preston zones-the vacancy pump journal, June 1965

The interaction between vacancies and zones and the kinetics of pre-precipitation in Al-rich alloys journal, January 1962

Displacement fields around Guinier–Preston 1 zones in Al–Cu alloys: investigations using MD and ADF-STEM image simulations journal, August 2018

Clustering Process of Vacancies in Quenched Aluminum journal, February 1982

Thermal expansion of CaFe 2 As 2 : Effect of cobalt doping and postgrowth thermal treatment journal, August 2013

Modeling the temperature dependent effect of twinning on the behavior of magnesium alloy AZ31B sheet journal, July 2007

The onset of twinning in metals: a constitutive description journal, November 2001

Energy barriers and hysteresis in martensitic phase transformations journal, September 2009

Strong Coupling of the Fe-Spin State and the As-As Hybridization in Iron-Pnictide Superconductors from First-Principle Calculations journal, January 2009

Title: Uniaxial compression of [001]-oriented CaFe₂As₂ single crystals:the effects of microstructure and temperature on superelasticity Part I: Experimental observations

Ductility in Intermetallic Compounds
journal, September 2003

Making and Breaking Bonds in the Solid State: The ThCr ₂ Si ₂ Structure
journal, September 1985

ThCr2Si2 structure type: The “perovskite” of intermetallics
journal, April 2019

Superconductivity in the iron selenide $K_{x} {Fe}_{2} {Se}_{2}$ $(0 \leq x \leq 1.0)$
journal, November 2010

Recent advances in iron-based superconductors toward applications
journal, April 2018

Pairing Mechanism in Fe-Based Superconductors
journal, March 2012

First-order structural phase transition in ${CaFe}_{2} {As}_{2}$
journal, July 2008

Hydrostatic-pressure tuning of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$
journal, December 2012

Structural, magnetic and superconducting phase transitions in CaFe2As2 under ambient and applied pressure
journal, May 2009

Pressure Induced Superconductivity in ${CaFe}_{2} {As}_{2}$
journal, July 2008

Unusual superconducting state at 49 K in electron-doped CaFe2As2 at ambient pressure
journal, September 2011

Control of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$
journal, June 2012

Uniaxial versus hydrostatic pressure-induced phase transitions in CaFe $_{2}$ As $_{2}$ and BaFe $_{2}$ As $_{2}$
journal, March 2012

Sample Dimensions Influence Strength and Crystal Plasticity
journal, August 2004

Size dependence of mechanical properties of gold at the micron scale in the absence of strain gradients
journal, April 2005

Size effects in the deformation of sub-micron Au columns
journal, November 2006

Plasticity of Micrometer-Scale Single Crystals in Compression
journal, August 2009

Plasticity in small-sized metallic systems: Intrinsic versus extrinsic size effect
journal, August 2011

Plasticity in Confined Dimensions
journal, June 2010

Ultra-strength materials
journal, September 2010

Superelastic and micaceous deformation in the intermetallic compound CaFe2As2
journal, December 2017

Composition, Compatibility, and the Functional Performances of Ternary NiTiX High-Temperature Shape Memory Alloys
journal, February 2016

Composition and temperature dependence of twinning stress in non-modulated martensite of Ni-Mn-Ga-Co-Cu magnetic shape memory alloys
journal, February 2018

Mechanisms for phase transformation induced slip in shape memory alloy micro-crystals
journal, June 2017

Temperature dependence and temperature limits of magnetic shape memory effect
journal, December 2003

Mechanisms of the multi-shape memory effect and temperature memory effect in shape memory polymers
journal, January 2010

Stabilization of an ambient-pressure collapsed tetragonal phase in CaFe $_{2}$ As $_{2}$ and tuning of the orthorhombic-antiferromagnetic transition temperature by over 70 K via control of nanoscale precipitates
journal, April 2011

Incipient plasticity during nanoindentation at elevated temperatures
journal, August 2004

Temperature dependence of the indentation size effect
journal, July 2010

A Nanoindentation Study of the Plastic Deformation and Fracture Mechanisms in Single-Crystalline CaFe2As2
journal, April 2018

Complex structures of different CaFe2As2 samples
journal, February 2014

Modeling pseudo-elastic behavior in small-scale ThCr2Si2-type crystals
journal, July 2018

Size dependence of the yield strength of fcc and bcc metallic micropillars with diameters of a few micrometers
journal, April 2012

Uniaxial compression of fcc Au nanopillars on an MgO substrate: The effects of prestraining and annealing
journal, September 2009

Thermal vacancy behavior analysis through thermal expansion, lattice parameter and elastic modulus measurements of B2-type FeAl
journal, February 2014

Microstructure and tetragonal-to-orthorhombic phase transition of $A {Fe}_{2} {As}_{2}$ $(A = Sr, Ca)$ as seen via transmission electron microscopy
journal, February 2009

Structural and physical properties of CaFe2As2
journal, May 2011

The formation of nanograin structures and accelerated room-temperature theta precipitation in a severely deformed Al–4wt.% Cu alloy
journal, March 2010

Structure of Age-Hardened Aluminium-Copper Alloys
journal, September 1938

Structure of Age-Hardened Aluminium-Copper Alloys
journal, September 1938

A model for the growth of Guinier-Preston zones-the vacancy pump
journal, June 1965

The interaction between vacancies and zones and the kinetics of pre-precipitation in Al-rich alloys
journal, January 1962

Displacement fields around Guinier–Preston 1 zones in Al–Cu alloys: investigations using MD and ADF-STEM image simulations
journal, August 2018

Clustering Process of Vacancies in Quenched Aluminum
journal, February 1982

Thermal expansion of CaFe $_{2}$ As $_{2}$ : Effect of cobalt doping and postgrowth thermal treatment
journal, August 2013

Modeling the temperature dependent effect of twinning on the behavior of magnesium alloy AZ31B sheet
journal, July 2007

The onset of twinning in metals: a constitutive description
journal, November 2001

Energy barriers and hysteresis in martensitic phase transformations
journal, September 2009

Strong Coupling of the Fe-Spin State and the As-As Hybridization in Iron-Pnictide Superconductors from First-Principle Calculations
journal, January 2009