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Magnetoelastic coupling in DyMn2O5 via infrared spectroscopy
- Cao, J.;
- Vergara, L.I.;
- Musfeldt, J.L.;
- Litvinchuk, A.P.;
- Wang, Y.J.;
- ... Park, S.;
- 외 1명
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26초록
We investigated the infrared-active phonons in DyMn2O5 as a function of temperature and magnetic field in order to elucidate the magnetic ordering-induced lattice distortions. Spin-lattice coupling in this geometrically frustrated multiferroic is evidenced by small frequency shifts of several phonon modes at various magnetic ordering temperatures, vibrational frequency shifts between 60 and 65 K from which we extract large coupling constants, and magnetic-field dependence of numerous phonons. We analyze these results in terms of local lattice distortions and discuss the consequences for the ferroelectric polarization and magnetodielectric effect.
키워드
RAMAN; MAGNETOSTRICTION; MANGANITE; STRICTION; CRYSTALS; PHONONS
- 제목
- Magnetoelastic coupling in DyMn2O5 via infrared spectroscopy
- 저자
- Cao, J.; Vergara, L.I.; Musfeldt, J.L.; Litvinchuk, A.P.; Wang, Y.J.; Park, S.; Cheong, S.-W.
- 발행일
- 2008-08
- 유형
- Article
- 권
- 78
- 호
- 6
- 언어
- ENG
- 출판사
- AMER PHYSICAL SOC
- 발행국가
- 미국
- ISSN
- E 2469-9969
P 2469-9950