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Title: Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO 3

Abstract

In this study, we present neutron inelastic scattering measurements of the low-energy phonons in single crystal BiFeO 3. The dispersions of the three acoustic phonon modes (LA along [100], TA 1 along [010], and TA 2 along [110]) and two low-energy optic phonon modes (LO and TO 1) 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. In conclusion, this suggests that the magnetic order and low-energy lattice dynamics in this multiferroic material are coupled.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [6];  [7];  [7];  [3];  [8];  [8];  [8];  [8];  [7]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  5. Univ. of Edinburgh, Scotland (United Kingdom)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  7. Brookhaven National Lab. (BNL), Upton, NY (United States)
  8. National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1265315
Alternate Identifier(s):
OSTI ID: 1181304
Grant/Contract Number:  
AC05-00OR22725; AC02-98CH10886; AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 6; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Schneeloch, John A., Xu, Zhijun, Wen, Jinsheng, Gehring, P. M., Stock, C., Matsuda, Masaaki, Winn, Barry L., Gu, Genda, Shapiro, Stephen M., Birgeneau, R. J., Ushiyama, T., Yanagisawa, Y., Tomioka, Y., Ito, T., and Xu, Guangyong. Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.064301.
Schneeloch, John A., Xu, Zhijun, Wen, Jinsheng, Gehring, P. M., Stock, C., Matsuda, Masaaki, Winn, Barry L., Gu, Genda, Shapiro, Stephen M., Birgeneau, R. J., Ushiyama, T., Yanagisawa, Y., Tomioka, Y., Ito, T., & Xu, Guangyong. Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3. United States. doi:10.1103/PhysRevB.91.064301.
Schneeloch, John A., Xu, Zhijun, Wen, Jinsheng, Gehring, P. M., Stock, C., Matsuda, Masaaki, Winn, Barry L., Gu, Genda, Shapiro, Stephen M., Birgeneau, R. J., Ushiyama, T., Yanagisawa, Y., Tomioka, Y., Ito, T., and Xu, Guangyong. Tue . "Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3". United States. doi:10.1103/PhysRevB.91.064301. https://www.osti.gov/servlets/purl/1265315.
@article{osti_1265315,
title = {Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3},
author = {Schneeloch, John A. and Xu, Zhijun and Wen, Jinsheng and Gehring, P. M. and Stock, C. and Matsuda, Masaaki and Winn, Barry L. and Gu, Genda and Shapiro, Stephen M. and Birgeneau, R. J. and Ushiyama, T. and Yanagisawa, Y. and Tomioka, Y. and Ito, T. and Xu, Guangyong},
abstractNote = {In this study, 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 [110]) 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 TN=640 K. In conclusion, this suggests that the magnetic order and low-energy lattice dynamics in this multiferroic material are coupled.},
doi = {10.1103/PhysRevB.91.064301},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 6,
volume = 91,
place = {United States},
year = {Tue Feb 10 00:00:00 EST 2015},
month = {Tue Feb 10 00:00:00 EST 2015}
}

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