skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Observation of the magnetic C 4 phase in Ca 1 - x Na x Fe 2 As 2 and its universality in the hole-doped 122 superconductors

Abstract

Since its discovery in 2014, the magnetic tetragonal C 4 phase has been identified in a growing number of hole-doped 122 Fe-based superconducting compounds. Exhibiting a unique double-Q magnetic structure and a strong competition with both superconducting and magnetic order parameters, the C 4 phase and the conditions of its formation are of significant interest to understanding the fundamental mechanisms in these materials. Particularly, separating the importance of direct changes to the relative size of hole and electron pockets at the Fermi surface (achieved via charge doping) from the role of structural changes due to differences of ionic radii of dopants is useful to determine the underlying parameter which causes the C 4 instability. Here, we report the discovery of the C 4 phase in a fourth member of the hole-doped 122 materials Ca 1-xNa xFe 2As 2(0.20 ≤ x ≤ 0.50) as determined from neutron and x-ray powder diffraction studies. The maximum of the C 4 dome is observed at x = 0.44 with a reentrant temperature T r = 52 K and an extent of Δx ~ 0.07 in composition. It is observed that for a range of compositions within the C 4 dome (0.40 ≤ x ≤more » 0.42), there is a second reentrance (Tr 2 < Tr) where the antiferromagnetic C 2 phase is recovered—a feature previously only seen in Ba 1-xK xFe 2As 2. A phase diagram is presented for Ca 1-xNa xFe 2As 2 and compared to the other Na-doped 122's—A 1-xNa xFe 2As 2 with A = Ba, Sr, and Ca. Lastly, the structural parameters for these three systems are compared and the importance of the “chemical pressure” due to changing the A-site ion (A = Ba, Sr, Ca) is discussed.« less

Authors:
 [1];  [2];  [2];  [2];  [3];  [2];  [2];  [4];  [2];  [2];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Northern Illinois Univ., DeKalb, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Northern Illinois Univ., DeKalb, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division; Materials Sciences and Engineering Division
OSTI Identifier:
1352516
Alternate Identifier(s):
OSTI ID: 1344007; OSTI ID: 1376534
Grant/Contract Number:  
AC02-06CH11357; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Taddei, K. M., Allred, J. M., Bugaris, D. E., Lapidus, S. H., Krogstad, M. J., Claus, H., Chung, D. Y., Kanatzidis, M. G., Osborn, R., Rosenkranz, S., and Chmaissem, O. Observation of the magnetic C4 phase in Ca1-xNaxFe2As2 and its universality in the hole-doped 122 superconductors. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.064508.
Taddei, K. M., Allred, J. M., Bugaris, D. E., Lapidus, S. H., Krogstad, M. J., Claus, H., Chung, D. Y., Kanatzidis, M. G., Osborn, R., Rosenkranz, S., & Chmaissem, O. Observation of the magnetic C4 phase in Ca1-xNaxFe2As2 and its universality in the hole-doped 122 superconductors. United States. doi:10.1103/PhysRevB.95.064508.
Taddei, K. M., Allred, J. M., Bugaris, D. E., Lapidus, S. H., Krogstad, M. J., Claus, H., Chung, D. Y., Kanatzidis, M. G., Osborn, R., Rosenkranz, S., and Chmaissem, O. Wed . "Observation of the magnetic C4 phase in Ca1-xNaxFe2As2 and its universality in the hole-doped 122 superconductors". United States. doi:10.1103/PhysRevB.95.064508. https://www.osti.gov/servlets/purl/1352516.
@article{osti_1352516,
title = {Observation of the magnetic C4 phase in Ca1-xNaxFe2As2 and its universality in the hole-doped 122 superconductors},
author = {Taddei, K. M. and Allred, J. M. and Bugaris, D. E. and Lapidus, S. H. and Krogstad, M. J. and Claus, H. and Chung, D. Y. and Kanatzidis, M. G. and Osborn, R. and Rosenkranz, S. and Chmaissem, O.},
abstractNote = {Since its discovery in 2014, the magnetic tetragonal C4 phase has been identified in a growing number of hole-doped 122 Fe-based superconducting compounds. Exhibiting a unique double-Q magnetic structure and a strong competition with both superconducting and magnetic order parameters, the C4 phase and the conditions of its formation are of significant interest to understanding the fundamental mechanisms in these materials. Particularly, separating the importance of direct changes to the relative size of hole and electron pockets at the Fermi surface (achieved via charge doping) from the role of structural changes due to differences of ionic radii of dopants is useful to determine the underlying parameter which causes the C4 instability. Here, we report the discovery of the C4 phase in a fourth member of the hole-doped 122 materials Ca1-xNaxFe2As2(0.20 ≤ x ≤ 0.50) as determined from neutron and x-ray powder diffraction studies. The maximum of the C4 dome is observed at x = 0.44 with a reentrant temperature Tr = 52 K and an extent of Δx ~ 0.07 in composition. It is observed that for a range of compositions within the C4 dome (0.40 ≤ x ≤ 0.42), there is a second reentrance (Tr2 < Tr) where the antiferromagnetic C2 phase is recovered—a feature previously only seen in Ba1-xKxFe2As2. A phase diagram is presented for Ca1-xNaxFe2As2 and compared to the other Na-doped 122's—A1-xNaxFe2As2 with A = Ba, Sr, and Ca. Lastly, the structural parameters for these three systems are compared and the importance of the “chemical pressure” due to changing the A-site ion (A = Ba, Sr, Ca) is discussed.},
doi = {10.1103/PhysRevB.95.064508},
journal = {Physical Review B},
number = 6,
volume = 95,
place = {United States},
year = {2017},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Symmetry-breaking orbital anisotropy observed for detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
journal, April 2011

  • Yi, M.; Lu, D.; Chu, J. -H.
  • Proceedings of the National Academy of Sciences, Vol. 108, Issue 17
  • DOI: 10.1073/pnas.1015572108

Muon spin rotation study of the magnetic structure in the tetragonal antiferromagnetic state of weakly underdoped Ba 1− x K x Fe 2 As 2
journal, September 2015


Spin-density-wave anomaly at 140 K in the ternary iron arsenide BaFe 2 As 2
journal, July 2008


Double-Q spin-density wave in iron arsenide superconductors
journal, January 2016

  • Allred, J. M.; Taddei, K. M.; Bugaris, D. E.
  • Nature Physics, Vol. 12, Issue 5
  • DOI: 10.1038/nphys3629

Least momentum space frustration as a condition for a ‘high T c sweet spot’ in iron-based superconductors
journal, July 2012


Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
journal, September 1976


Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides
journal, July 2012


Magnetic and structural transitions in layered iron arsenide systems: A Fe 2 As 2 versus R FeAsO
journal, September 2008


Manifesto for a higher Tc
journal, April 2011

  • Basov, D. N.; Chubukov, Andrey V.
  • Nature Physics, Vol. 7, Issue 4
  • DOI: 10.1038/nphys1975

Scaling between Magnetic and Lattice Fluctuations in Iron Pnictide Superconductors
journal, September 2013


Magnetically driven suppression of nematic order in an iron-based superconductor
journal, May 2014

  • Avci, S.; Chmaissem, O.; Allred, J. M.
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms4845

Comparison of Ab initio Low-Energy Models for LaFePO, LaFeAsO, BaFe 2 As 2 , LiFeAs, FeSe, and FeTe: Electron Correlation and Covalency
journal, April 2010

  • Miyake, Takashi; Nakamura, Kazuma; Arita, Ryotaro
  • Journal of the Physical Society of Japan, Vol. 79, Issue 4
  • DOI: 10.1143/JPSJ.79.044705

Anion height dependence of T c and the density of states in iron-based superconductors
journal, May 2010


Effect of Uniaxial Strain on the Structural and Magnetic Phase Transitions in BaFe 2 As 2
journal, February 2012


Tuning magnetism in FeAs-based materials via a tetrahedral structure
journal, August 2012


Detailed magnetic and structural analysis mapping a robust magnetic C 4 dome in Sr 1 x Na x Fe 2 As 2
journal, April 2016


Structural, magnetic, and superconducting properties of Ba 1 x Na x Fe 2 As 2
journal, September 2013


Interplay of magnetic and structural transitions in iron-based pnictide superconductors
journal, July 2010


Divergent Nematic Susceptibility in an Iron Arsenide Superconductor
journal, August 2012


Phase diagram of Ba 1 x K x Fe 2 As 2
journal, May 2012


Measurement of the elastoresistivity coefficients of the underdoped iron arsenide Ba(Fe 0.975 Co 0.025 ) 2 As 2
journal, August 2013


Disorder-promoted C 4 -symmetric magnetic order in iron-based superconductors
journal, April 2016


Anisotropic itinerant magnetism and spin fluctuations in BaFe 2 As 2 : A neutron scattering study
journal, February 2009


Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO 1- y (Ln = La, Nd)
journal, August 2008

  • Lee, Chul-Ho; Iyo, Akira; Eisaki, Hiroshi
  • Journal of the Physical Society of Japan, Vol. 77, Issue 8
  • DOI: 10.1143/JPSJ.77.083704

Spin reorientation driven by the interplay between spin-orbit coupling and Hund's rule coupling in iron pnictides
journal, December 2015


Superconductivity close to magnetic instability in Fe ( Se 1 x Te x ) 0.82
journal, December 2008


Unconventional superconductivity in Ba0.6K0.4Fe2As2 from inelastic neutron scattering
journal, December 2008

  • Christianson, A. D.; Goremychkin, E. A.; Osborn, R.
  • Nature, Vol. 456, Issue 7224
  • DOI: 10.1038/nature07625

Tetragonal magnetic phase in Ba 1 x K x Fe 2 As 2 from x-ray and neutron diffraction
journal, September 2015


Maximizing the Fermi-surface multiplicity optimizes the superconducting state of iron pnictide compounds
journal, July 2011


Different resistivity response to spin-density wave and superconductivity at 20 K in Ca 1− x Na x Fe 2 As 2
journal, September 2008


Superconductivity-induced re-entrance of the orthorhombic distortion in Ba1−xKxFe2As2
journal, July 2015

  • Böhmer, A. E.; Hardy, F.; Wang, L.
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms8911

EXPGUI , a graphical user interface for GSAS
journal, April 2001


Interplay between tetragonal magnetic order, stripe magnetism, and superconductivity in iron-based materials
journal, March 2015


Superconductivity above 33 K in (Ca 1 − x Na x )Fe 2 As 2
journal, May 2010


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

Neutron diffraction study of the magnetic and structural phase transitions in BaFe 2 As 2
journal, May 2009


Competing magnetic double- Q phases and superconductivity-induced reentrance of C 2 magnetic stripe order in iron pnictides
journal, October 2015


Doping dependence of the superconductivity of (Ca 1 x Na x )Fe 2 As 2
journal, November 2011


Iron-Based Layered Superconductor:  LaOFeP
journal, August 2006

  • Kamihara, Yoichi; Hiramatsu, Hidenori; Hirano, Masahiro
  • Journal of the American Chemical Society, Vol. 128, Issue 31
  • DOI: 10.1021/ja063355c

Phenomenological model of anisotropic peak broadening in powder diffraction
journal, April 1999


Magnetic order without tetragonal-symmetry-breaking in iron arsenides: Microscopic mechanism and spin-wave spectrum
journal, January 2015


Spin reorientation in Ba 0.65 Na 0.35 Fe 2 As 2 studied by single-crystal neutron diffraction
journal, February 2015


Complex phase diagram of Ba 1 x Na x Fe 2 As 2 : A multitude of phases striving for the electronic entropy
journal, January 2016


Effect of doping on structural and superconducting properties in Ca 1 x Na x Fe 2 As 2 single crystals ( x =0.5, 0.6, 0.75)
journal, August 2011


Vestigial chiral and charge orders from bidirectional spin-density waves: Application to the iron-based superconductors
journal, January 2016


Electronic nematicity above the structural and superconducting transition in BaFe2(As1−xP x )2
journal, June 2012

  • Kasahara, S.; Shi, H. J.; Hashimoto, K.
  • Nature, Vol. 486, Issue 7403
  • DOI: 10.1038/nature11178

Competing orders and spin-density-wave instability in La(O 1−x F x )FeAs
journal, June 2008


Magnetism, Superconductivity, and Spontaneous Orbital Order in Iron-Based Superconductors: Which Comes First and Why?
journal, December 2016


Magnetoelastic coupling in the phase diagram of Ba 1 x K x Fe 2 As 2 as seen via neutron diffraction
journal, May 2011