Acoustic phonon dispersion and diffuse scattering across the valence transition of (Pr0.85Y0.15)0.7Ca0.3CoO3-δ

Phelan, D.; Krogstad, M. J.; Schreiber, N. J.; Osborn, R.; Said, A. H.; Zheng, H.; Rosenkranz, S.

doi:10.1103/PhysRevB.100.054101

Title: Acoustic phonon dispersion and diffuse scattering across the valence transition of ${(P r_{0.85} Y_{0.15})}_{0.7} C a_{0.3} Co O_{3 - δ}$

Abstract

A number of praseodymium-containing cobalt perovskites undergo temperature-dependent metal-insulator transitions that involve a transfer of electrons between cobalt and praseodymium cations. We have used high- resolution inelastic x-ray scattering to directly measure the changes in the acoustic phonon dispersion through this transition in one such single crystal, (Pr_0.85Y_0.15)(0.)7Ca_0.3CoO_3-$$\delta$$, in an effort to understand the role of the lattice in the transition. Transverse and acoustic modes were measured in the pseudocubic (200), (220), and (222) zones both above and below the transition temperature. The resultant dispersion curves reveal that the transition is associated with a significant hardening of the pseudocubic C₁₁ elastic constant, whereas C₁₂ and C₄₄ do not significantly change. Here, analysis of the temperature-dependent damping of the longitudinal acoustic mode in the (200) zone reveals a peak in the damping at temperatures just above the transition temperature. Significant elastic diffuse scattering is also observed above the transition temperature, likely resulting from clusters in which the electron transfer is beginning to occur as a precursor to the phase transition. The presence of these clusters likely limits the phonon lifetimes, thus leading to the observed damping.

Authors:

Phelan, D. ^[1]; Krogstad, M. J. ^[1]; Schreiber, N. J. ^[2]; Osborn, R. ^[1]; Said, A. H. ^[3]; Zheng, H. ^[1]; Rosenkranz, S. ^[1]

Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Cornell Univ., Ithaca, NY (United States)
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Publication Date:: Fri Aug 02 00:00:00 EDT 2019

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1557613

Alternate Identifier(s):: OSTI ID: 1546823

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 100; Journal Issue: 5; 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


                    Phelan, D., Krogstad, M. J., Schreiber, N. J., Osborn, R., Said, A. H., Zheng, H., and Rosenkranz, S. Acoustic phonon dispersion and diffuse scattering across the valence transition of (Pr0.85Y0.15)0.7Ca0.3CoO3-δ.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevB.100.054101.

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                    Phelan, D., Krogstad, M. J., Schreiber, N. J., Osborn, R., Said, A. H., Zheng, H., & Rosenkranz, S. Acoustic phonon dispersion and diffuse scattering across the valence transition of (Pr0.85Y0.15)0.7Ca0.3CoO3-δ.  United States.  https://doi.org/10.1103/PhysRevB.100.054101

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                    Phelan, D., Krogstad, M. J., Schreiber, N. J., Osborn, R., Said, A. H., Zheng, H., and Rosenkranz, S. Fri .  
"Acoustic phonon dispersion and diffuse scattering across the valence transition of (Pr0.85Y0.15)0.7Ca0.3CoO3-δ".  United States.  https://doi.org/10.1103/PhysRevB.100.054101.  https://www.osti.gov/servlets/purl/1557613.

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@article{osti_1557613,

  title        = {Acoustic phonon dispersion and diffuse scattering across the valence transition of (Pr0.85Y0.15)0.7Ca0.3CoO3-δ},

  author       = {Phelan, D. and Krogstad, M. J. and Schreiber, N. J. and Osborn, R. and Said, A. H. and Zheng, H. and Rosenkranz, S.},

  abstractNote = {A number of praseodymium-containing cobalt perovskites undergo temperature-dependent metal-insulator transitions that involve a transfer of electrons between cobalt and praseodymium cations. We have used high- resolution inelastic x-ray scattering to directly measure the changes in the acoustic phonon dispersion through this transition in one such single crystal, (Pr0.85Y0.15)(0.)7Ca0.3CoO3-$\delta$, in an effort to understand the role of the lattice in the transition. Transverse and acoustic modes were measured in the pseudocubic (200), (220), and (222) zones both above and below the transition temperature. The resultant dispersion curves reveal that the transition is associated with a significant hardening of the pseudocubic C11 elastic constant, whereas C12 and C44 do not significantly change. Here, analysis of the temperature-dependent damping of the longitudinal acoustic mode in the (200) zone reveals a peak in the damping at temperatures just above the transition temperature. Significant elastic diffuse scattering is also observed above the transition temperature, likely resulting from clusters in which the electron transfer is beginning to occur as a precursor to the phase transition. The presence of these clusters likely limits the phonon lifetimes, thus leading to the observed damping.},

  doi          = {10.1103/PhysRevB.100.054101},

  journal      = {Physical Review B},

  number       = 5,

  volume       = 100,

  place        = {United States},

  year         = {Fri Aug 02 00:00:00 EDT 2019},

  month        = {Fri Aug 02 00:00:00 EDT 2019}

}

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https://doi.org/10.1103/PhysRevB.100.054101

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Cited by: 4 works

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Figures / Tables:

Table I: Sound velocities determined from the linear, low-q portion of the acoustic phonon dispersion. The uncertainties represent the standard deviation from the fitting.

All figures and tables (13 total)

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Works referenced in this record:

Spin-state transition in Pr $_{0.5}$ Ca $_{0.5}$ CoO $_{3}$ analyzed by x-ray absorption and emission spectroscopies
journal, September 2012

Herrero-Martín, J.; García-Muñoz, J. L.; Kvashnina, K.
Physical Review B, Vol. 86, Issue 12
DOI: 10.1103/PhysRevB.86.125106

Charge transfer, valence, and the metal-insulator transition in ${Pr}_{0.5} {Ca}_{0.5} {CoO}_{3}$
journal, April 2010

Knížek, K.; Hejtmánek, J.; Novák, P.
Physical Review B, Vol. 81, Issue 15
DOI: 10.1103/PhysRevB.81.155113

Valence transition in (Pr,Ca)CoO $_{3}$ cobaltites: Charge migration at the metal-insulator transition
journal, July 2011

García-Muñoz, José Luis; Frontera, Carlos; Barón-González, Aura J.
Physical Review B, Vol. 84, Issue 4
DOI: 10.1103/PhysRevB.84.045104

Strong Influence of the Diffuse Component on the Lattice Dynamics in Pb(Mg _1/3 Nb _2/3 )O ₃
journal, November 2005

Stock, C.; Luo, H.; Viehland, D.
Journal of the Physical Society of Japan, Vol. 74, Issue 11
DOI: 10.1143/JPSJ.74.3002

Continuous and Discontinuous Semiconductor-Metal Transition in Samarium Monochalcogenides Under Pressure
journal, November 1970

Jayaraman, A.; Narayanamurti, V.; Bucher, E.
Physical Review Letters, Vol. 25, Issue 20
DOI: 10.1103/PhysRevLett.25.1430

First-order valence transition: Neutron diffraction, inelastic neutron scattering, and x-ray absorption investigations on the double perovskite ${Ba}_{2} {PrRu}_{0.9} {Ir}_{0.1} O_{6}$
journal, May 2019

Sannigrahi, J.; Adroja, D. T.; Ritter, C.
Physical Review B, Vol. 99, Issue 18
DOI: 10.1103/PhysRevB.99.184440

Valence fluctuation phenomena
journal, January 1981

Lawrence, J. M.; Riseborough, P. S.; Parks, R. D.
Reports on Progress in Physics, Vol. 44, Issue 1
DOI: 10.1088/0034-4885/44/1/001

Iso-Structural Phase Transitions in BiFeO3
journal, March 2010

Scott, James F.
Advanced Materials, Vol. 22, Issue 19
DOI: 10.1002/adma.200904229

Simultaneous First-Order Valence and Oxygen Vacancy Order/Disorder Transitions in (Pr _0.85 Y _0.15 ) _0.7 Ca _0.3 CoO _3−δ via Analytical Transmission Electron Microscopy
journal, December 2015

Gulec, Ahmet; Phelan, Daniel; Leighton, Chris
ACS Nano, Vol. 10, Issue 1
DOI: 10.1021/acsnano.5b06067

The three-dimensional pair distribution function analysis of disordered single crystals: basic concepts
journal, May 2012

Weber, Thomas; Simonov, Arkadiy
Zeitschrift für Kristallographie, Vol. 227, Issue 5
DOI: 10.1524/zkri.2012.1504

Single crystal growth and structural evolution across the 1st order valence transition in (Pr1−yYy)1−xCaxCoO3-δ
journal, October 2017

Schreiber, N. J.; Zhang, Junjie; Zheng, Hong
Journal of Solid State Chemistry, Vol. 254
DOI: 10.1016/j.jssc.2017.06.026

Coupled valence and spin state transition in (Pr $_{0.7}$ Sm $_{0.3}$ ) $_{0.7}$ Ca $_{0.3}$ CoO $_{3}$
journal, March 2013

Guillou, F.; Zhang, Q.; Hu, Z.
Physical Review B, Vol. 87, Issue 11
DOI: 10.1103/PhysRevB.87.115114

Simultaneous metal-insulator and spin-state transitions in $\Pr_{0.5} {Ca}_{0.5} {CoO}_{3}$
journal, August 2002

Tsubouchi, Shingo; Kyômen, Tôru; Itoh, Mitsuru
Physical Review B, Vol. 66, Issue 5
DOI: 10.1103/PhysRevB.66.052418

Spin-state crossover and low-temperature magnetic state in yttrium-doped Pr $_{0.7}$ Ca $_{0.3}$ CoO $_{3}$
journal, December 2013

Knížek, K.; Hejtmánek, J.; Maryško, M.
Physical Review B, Vol. 88, Issue 22
DOI: 10.1103/PhysRevB.88.224412

Lattice dynamics of mixed-valent SmS
journal, March 1982

Mook, H. A.; McWhan, D. B.; Holtzberg, F.
Physical Review B, Vol. 25, Issue 6
DOI: 10.1103/PhysRevB.25.4321

Valence transition in ordered perovskites Ba2PrRu1−xIrxO6
journal, October 2001

Wakeshima, Makoto; Izumiyama, Yuki; Doi, Yoshihiro
Solid State Communications, Vol. 120, Issue 7-8
DOI: 10.1016/S0038-1098(01)00388-X

Transport and Magnetic Studies on the Spin State Transition of Pr _{1- x} Ca _x CoO ₃ up to High Pressure
journal, July 2004

Fujita, Toshiaki; Miyashita, Takeshi; Yasui, Yukio
Journal of the Physical Society of Japan, Vol. 73, Issue 7
DOI: 10.1143/JPSJ.73.1987

Thermally and field-driven spin-state transitions in (Pr ₁₋ _y Y _y ) _0.7 Ca _0.3 CoO ₃
journal, April 2011

Maryško, M.; Jirák, Z.; Knížek, K.
Journal of Applied Physics, Vol. 109, Issue 7
DOI: 10.1063/1.3559485

Suppression of the metal-insulator transition by magnetic field in (Pr ₁₋ _y Y _y ) _0.7 Ca _0.3 CoO ₃ ( y = 0.0625)
journal, June 2014

Naito, Tomoyuki; Fujishiro, Hiroyuki; Nishizaki, Terukazu
Journal of Applied Physics, Vol. 115, Issue 23
DOI: 10.1063/1.4884435

Valence change of praseodymium in Pr $_{0.5}$ Ca $_{0.5}$ CoO $_{3}$ investigated by x-ray absorption spectroscopy
journal, September 2011

Herrero-Martín, J.; García-Muñoz, J. L.; Valencia, S.
Physical Review B, Vol. 84, Issue 11
DOI: 10.1103/PhysRevB.84.115131

Interpretation of diffuse X-ray scattering via models of disorder
journal, June 1994

Welberry, T. R.; Butler, B. D.
Journal of Applied Crystallography, Vol. 27, Issue 3
DOI: 10.1107/S0021889893011392

Neutron Scattering Study of CoO ₆ Distortion and Its Relation to the Spin-State Transition in Pr _0.5 Ca _0.5 CoO ₃
journal, March 2009

Tong, Peng; Wu, Yongsu; Kim, Bongju
Journal of the Physical Society of Japan, Vol. 78, Issue 3
DOI: 10.1143/JPSJ.78.034702

Valence Shift of Pr Ion from 3+ to 4+ in (Pr _{1- y} Y _y ) _0.7 Ca _0.3 CoO ₃ Estimated by X-Ray Absorption Spectroscopy
journal, June 2012

Fujishiro, Hiroyuki; Naito, Tomoyuki; Ogawa, Satoru
Journal of the Physical Society of Japan, Vol. 81, Issue 6
DOI: 10.1143/JPSJ.81.064709

Cerium; Crystal Structure and Position in The Periodic Table
journal, September 2014

Johansson, Börje; Luo, Wei; Li, Sa
Scientific Reports, Vol. 4, Issue 1
DOI: 10.1038/srep06398

Magnetically inhomogeneous ground state below the first-order valence transition in ( $\Pr_{1 - y} Y_{y})_{0.7} {Ca}_{0.3} Co O_{3 - δ}$
journal, May 2014

Phelan, D.; Bhatti, Kanwal Preet; Taylor, M.
Physical Review B, Vol. 89, Issue 18
DOI: 10.1103/PhysRevB.89.184427

Metal-insulator transition and the ${Pr}^{3 +} / {Pr}^{4 +}$ valence shift in ${({Pr}_{1 - y} Y_{y})}_{0.7} {Ca}_{0.3} {CoO}_{3}$
journal, October 2010

Hejtmánek, J.; Šantavá, E.; Knížek, K.
Physical Review B, Vol. 82, Issue 16
DOI: 10.1103/PhysRevB.82.165107

Phonon dispersion in intermediate-valence ${Sm}_{0.75}$ $Y_{0.25}$ S
journal, September 1978

Mook, H. A.; Nicklow, R. M.; Penney, T.
Physical Review B, Vol. 18, Issue 6
DOI: 10.1103/PhysRevB.18.2925

Phonon anomalies at the valence transition of SmS: An inelastic x-ray-scattering study under pressure
journal, December 2002

Raymond, S.; Rueff, J. P.; D’Astuto, M.
Physical Review B, Vol. 66, Issue 22
DOI: 10.1103/PhysRevB.66.220301

DENSITY OF STATES EFFECTS IN ALLOYS OF SmS WITH YS AND SmAs
journal, October 1976

Von Molnar, S.; Penney, T.; Holtzberg, F.
Le Journal de Physique Colloques, Vol. 37, Issue C4
DOI: 10.1051/jphyscol:1976442

Neutron-scattering investigation of the phonons in intermediate-valence ${Sm}_{0.75}$ $Y_{0.25}$ S
journal, August 1979

Mook, H. A.; Nicklow, R. M.
Physical Review B, Vol. 20, Issue 4
DOI: 10.1103/PhysRevB.20.1656

Observations of Thin Crystals of TiNi in Premartensitic States
journal, April 1968

Chandra, K.; Purdy, G. R.
Journal of Applied Physics, Vol. 39, Issue 5
DOI: 10.1063/1.1656522

Electrical resistivity anomaly in (Pr _1−y M _y ) _1−x Ca _x CoO ₃ epitaxial films (M=Y, Gd) fabricated by pulsed laser deposition
journal, February 2016

Noda, Y.; Fujishiro, H.; Naito, T.
AIP Advances, Vol. 6, Issue 2
DOI: 10.1063/1.4942558

Lattice dynamics of quenched diffuse ω phase in ${Zr}_{0.8}$ ${Nb}_{0.2}$
journal, September 1989

Noda, Y.; Yamada, Y.; Shapiro, S. M.
Physical Review B, Vol. 40, Issue 9
DOI: 10.1103/PhysRevB.40.5995

Figures / Tables found in this record:

Supplementary Fig. 1 (p. 28)

Supplementary Fig. 2 (p. 29)

Supplementary Fig. 3 (p. 30)

Supplementary Fig. 4 (p. 31)

Supplementary Fig. 5 (p. 32)

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Title: Acoustic phonon dispersion and diffuse scattering across the valence transition of ( P r 0.85 Y 0.15 ) 0.7 C a 0.3 Co O 3 - δ

Abstract

Citation Formats

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Interpretation of diffuse X-ray scattering via models of disorder
journal, June 1994

Neutron Scattering Study of CoO ₆ Distortion and Its Relation to the Spin-State Transition in Pr _0.5 Ca _0.5 CoO ₃
journal, March 2009

Valence Shift of Pr Ion from 3+ to 4+ in (Pr _{1- y} Y _y ) _0.7 Ca _0.3 CoO ₃ Estimated by X-Ray Absorption Spectroscopy
journal, June 2012

Cerium; Crystal Structure and Position in The Periodic Table
journal, September 2014

Magnetically inhomogeneous ground state below the first-order valence transition in ( $\Pr_{1 - y} Y_{y})_{0.7} {Ca}_{0.3} Co O_{3 - δ}$
journal, May 2014

Metal-insulator transition and the ${Pr}^{3 +} / {Pr}^{4 +}$ valence shift in ${({Pr}_{1 - y} Y_{y})}_{0.7} {Ca}_{0.3} {CoO}_{3}$
journal, October 2010

Phonon dispersion in intermediate-valence ${Sm}_{0.75}$ $Y_{0.25}$ S
journal, September 1978

Phonon anomalies at the valence transition of SmS: An inelastic x-ray-scattering study under pressure
journal, December 2002

DENSITY OF STATES EFFECTS IN ALLOYS OF SmS WITH YS AND SmAs
journal, October 1976

Neutron-scattering investigation of the phonons in intermediate-valence ${Sm}_{0.75}$ $Y_{0.25}$ S
journal, August 1979

Observations of Thin Crystals of TiNi in Premartensitic States
journal, April 1968

Electrical resistivity anomaly in (Pr _1−y M _y ) _1−x Ca _x CoO ₃ epitaxial films (M=Y, Gd) fabricated by pulsed laser deposition
journal, February 2016

Lattice dynamics of quenched diffuse ω phase in ${Zr}_{0.8}$ ${Nb}_{0.2}$
journal, September 1989