Study of spin-phonon coupling in multiferroic BiFeO3 through Raman spectroscopy

Thi Minh Hien Nguyen, Xuan Nghia Nguyen, Xiang Bai Chen, Xuan Thang To, Seongsu Lee, Thi Huyen Nguyen, In Sang Yang

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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.

Original languageEnglish
Article number128884
JournalJournal of Molecular Structure
StatePublished - 15 Dec 2020

Bibliographical note

Funding Information:
This research is funded by Graduate University of Science and Technology under grant number GUST.STS.DT2017-VL02 . I-S. Y. acknowledges the financial support by the National Research Foundation of Korea (NRF) grant funded by the Korean government (Grant No. 2017R1A2B2009309 ). X. B. Chen acknowledges the support by the National Natural Science Foundation of China (Grant No. 11574241 ).

Publisher Copyright:
© 2020


  • Multiferroic BiFeO
  • Raman scattering
  • Spin-phonon coupling
  • Spin-reorientation transition


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