Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3

John A. Schneeloch; Zhijun Xu; Jinsheng Wen; P. M. Gehring; C. Stock; M. Matsuda; B. Winn; Genda Gu; Stephen M. Shapiro; R. J. Birgeneau; T. Ushiyama; Y. Yanagisawa; Y. Tomioka; T. Ito; Guangyong Xu

doi:10.1103/PhysRevB.91.064301

Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3

John A. Schneeloch, Zhijun Xu, Jinsheng Wen, P. M. Gehring, C. Stock, M. Matsuda, B. Winn, Genda Gu, Stephen M. Shapiro, R. J. Birgeneau, T. Ushiyama, Y. Yanagisawa, Y. Tomioka, T. Ito, Guangyong Xu^*

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present neutron inelastic scattering measurements of the low-energy phonons in single crystal BiFeO3. The dispersions of the three acoustic phonon modes (LA along [100], TA(1) along [010], and TA(2) along [1 (1) over bar0]) and two low-energy optic phonon modes (LO and TO1) have been mapped out between 300 and 700 K. Elastic constants are extracted from the phonon measurements. The energy linewidths of both TA phonons at the zone boundary clearly broaden when the system is warmed toward the magnetic ordering temperature T-N = 640 K. This suggests that the magnetic order and low-energy lattice dynamics in this multiferroic material are coupled.

Original language	English
Article number	064301
Number of pages	5
Journal	Physical review B
Volume	91
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.91.064301
Publication status	Published - 10 Feb 2015

Keywords / Materials (for Non-textual outputs)

BISMUTH FERRITE
TEMPERATURE
CRYSTALS

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10.1103/PhysRevB.91.064301

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Schneeloch, J. A., Xu, Z., Wen, J., Gehring, P. M., Stock, C., Matsuda, M., Winn, B., Gu, G., Shapiro, S. M., Birgeneau, R. J., Ushiyama, T., Yanagisawa, Y., Tomioka, Y., Ito, T., & Xu, G. (2015). Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3. Physical review B, 91(6), Article 064301. https://doi.org/10.1103/PhysRevB.91.064301

@article{807ce2ef7aa5433d82518489a16e01fc,

title = "Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3",

abstract = "We present neutron inelastic scattering measurements of the low-energy phonons in single crystal BiFeO3. The dispersions of the three acoustic phonon modes (LA along [100], TA(1) along [010], and TA(2) along [1 (1) over bar0]) and two low-energy optic phonon modes (LO and TO1) have been mapped out between 300 and 700 K. Elastic constants are extracted from the phonon measurements. The energy linewidths of both TA phonons at the zone boundary clearly broaden when the system is warmed toward the magnetic ordering temperature T-N = 640 K. This suggests that the magnetic order and low-energy lattice dynamics in this multiferroic material are coupled.",

keywords = "BISMUTH FERRITE, TEMPERATURE, CRYSTALS",

author = "Schneeloch, {John A.} and Zhijun Xu and Jinsheng Wen and Gehring, {P. M.} and C. Stock and M. Matsuda and B. Winn and Genda Gu and Shapiro, {Stephen M.} and Birgeneau, {R. J.} and T. Ushiyama and Y. Yanagisawa and Y. Tomioka and T. Ito and Guangyong Xu",

year = "2015",

month = feb,

day = "10",

doi = "10.1103/PhysRevB.91.064301",

language = "English",

volume = "91",

journal = "Physical review B",

issn = "1098-0121",

publisher = "American Physical Society",

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TY - JOUR

T1 - Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3

AU - Schneeloch, John A.

AU - Xu, Zhijun

AU - Wen, Jinsheng

AU - Gehring, P. M.

AU - Stock, C.

AU - Matsuda, M.

AU - Winn, B.

AU - Gu, Genda

AU - Shapiro, Stephen M.

AU - Birgeneau, R. J.

AU - Ushiyama, T.

AU - Yanagisawa, Y.

AU - Tomioka, Y.

AU - Ito, T.

AU - Xu, Guangyong

PY - 2015/2/10

Y1 - 2015/2/10

N2 - We present neutron inelastic scattering measurements of the low-energy phonons in single crystal BiFeO3. The dispersions of the three acoustic phonon modes (LA along [100], TA(1) along [010], and TA(2) along [1 (1) over bar0]) and two low-energy optic phonon modes (LO and TO1) have been mapped out between 300 and 700 K. Elastic constants are extracted from the phonon measurements. The energy linewidths of both TA phonons at the zone boundary clearly broaden when the system is warmed toward the magnetic ordering temperature T-N = 640 K. This suggests that the magnetic order and low-energy lattice dynamics in this multiferroic material are coupled.

AB - We present neutron inelastic scattering measurements of the low-energy phonons in single crystal BiFeO3. The dispersions of the three acoustic phonon modes (LA along [100], TA(1) along [010], and TA(2) along [1 (1) over bar0]) and two low-energy optic phonon modes (LO and TO1) have been mapped out between 300 and 700 K. Elastic constants are extracted from the phonon measurements. The energy linewidths of both TA phonons at the zone boundary clearly broaden when the system is warmed toward the magnetic ordering temperature T-N = 640 K. This suggests that the magnetic order and low-energy lattice dynamics in this multiferroic material are coupled.

KW - BISMUTH FERRITE

KW - TEMPERATURE

KW - CRYSTALS

U2 - 10.1103/PhysRevB.91.064301

DO - 10.1103/PhysRevB.91.064301

M3 - Article

SN - 1098-0121

VL - 91

JO - Physical review B

JF - Physical review B

IS - 6

M1 - 064301

ER -

Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3

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Keywords / Materials (for Non-textual outputs)

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