Study of spin-phonon coupling in multiferroic BiFeO3 through Raman spectroscopy
- 주제(키워드) Multiferroic BiFeO3 , Raman scattering , Spin-phonon coupling , Spin-reorientation transition
- 등재 SCIE, SCOPUS
- 발행기관 Elsevier B.V.
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000168710
- 본문언어 영어
- Published As https://dx.doi.org/10.1016/j.molstruc.2020.128884
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Spin-phonon coupling in multiferroic BiFeO3 single crystal is studied through temperature dependant polarized Raman spectroscopy. The phonon hardening appears at 200 K and becomes stronger below ~135 K. Clear anomalous temperature dependence of the phonon hardening near the magnetic transitions evidence the presence of a spin-phonon coupling in BiFeO3. Different phonon modes show very distinct spin-phonon coupling behaviors. Possible interpretations of the anomalous of the phonon hardening are discussed. We suggest that the phonon hardening would be correlated to spin reorientation and partially influenced by strains of Bi vacancies. © 2020
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