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

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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], TA1 along [010], and TA2 along [11¯0]) and two low-energy optic phonon modes (LO and TO1) have been mapped out between 300 and 700K. 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 TN=640K. This suggests that the magnetic order and low-energy lattice dynamics in this multiferroic material are coupled.

Original language	English
Article number	064301
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.91.064301
State	Published - Feb 10 2015

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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 - Condensed Matter and Materials Physics, 91(6), Article 064301. https://doi.org/10.1103/PhysRevB.91.064301

@article{890f2906c5944fa2ad71c70ad3b8ec1c,

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], TA1 along [010], and TA2 along [11¯0]) and two low-energy optic phonon modes (LO and TO1) have been mapped out between 300 and 700K. 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 TN=640K. This suggests that the magnetic order and low-energy lattice dynamics in this multiferroic material are coupled.",

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",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = feb,

day = "10",

doi = "10.1103/PhysRevB.91.064301",

language = "English",

volume = "91",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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publisher = "American Physical Society",

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Schneeloch, JA, Xu, Z, Wen, J, Gehring, PM, Stock, C, Matsuda, M , Winn, B, Gu, G, Shapiro, SM, Birgeneau, RJ, 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 - Condensed Matter and Materials Physics, vol. 91, no. 6, 064301. https://doi.org/10.1103/PhysRevB.91.064301

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], TA1 along [010], and TA2 along [11¯0]) and two low-energy optic phonon modes (LO and TO1) have been mapped out between 300 and 700K. 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 TN=640K. 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], TA1 along [010], and TA2 along [11¯0]) and two low-energy optic phonon modes (LO and TO1) have been mapped out between 300 and 700K. 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 TN=640K. This suggests that the magnetic order and low-energy lattice dynamics in this multiferroic material are coupled.

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U2 - 10.1103/PhysRevB.91.064301

DO - 10.1103/PhysRevB.91.064301

M3 - Article

AN - SCOPUS:84922573422

SN - 1098-0121

VL - 91

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 6

M1 - 064301

ER -

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

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