Neutron inelastic scattering measurements of low-energy phonons in the multiferroic BiFeO3
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- Univ. of Edinburgh, Scotland (United Kingdom)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725; AC02-98CH10886; AC02-05CH11231
- OSTI ID:
- 1265315
- Alternate ID(s):
- OSTI ID: 1181304
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 6; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 13 works
Citation information provided by
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Web of Science
Lattice and spin dynamics in multiferroic BiFeO3 and RMnO3
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journal | May 2019 |
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