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

doi:10.1016/j.molstruc.2020.128884

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

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 language	English
Article number	128884
Journal	Journal of Molecular Structure
Volume	1222
DOIs	https://doi.org/10.1016/j.molstruc.2020.128884
State	Published - 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

Keywords

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

Access to Document

10.1016/j.molstruc.2020.128884

Cite this

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title = "Study of spin-phonon coupling in multiferroic BiFeO3 through Raman spectroscopy",

abstract = "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.",

keywords = "Multiferroic BiFeO, Raman scattering, Spin-phonon coupling, Spin-reorientation transition",

author = "Nguyen, {Thi Minh Hien} and Nguyen, {Xuan Nghia} and Chen, {Xiang Bai} and To, {Xuan Thang} and Seongsu Lee and Nguyen, {Thi Huyen} and Yang, {In Sang}",

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: {\textcopyright} 2020",

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T1 - Study of spin-phonon coupling in multiferroic BiFeO3 through Raman spectroscopy

AU - Nguyen, Thi Minh Hien

AU - Nguyen, Xuan Nghia

AU - Chen, Xiang Bai

AU - To, Xuan Thang

AU - Lee, Seongsu

AU - Nguyen, Thi Huyen

AU - Yang, In Sang

N1 - 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

PY - 2020/12/15

Y1 - 2020/12/15

N2 - 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.

AB - 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.

KW - Multiferroic BiFeO

KW - Raman scattering

KW - Spin-phonon coupling

KW - Spin-reorientation transition

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