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Spiral spin structures and origin of the magnetoelectric coupling in YMn2O5
- Kim, J.-H.;
- Lee, S.-H.;
- Park, S. I.;
- Kenzelmann, M.;
- Harris, A. B.;
- ... Park, S. Y.;
- 외 10명
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49초록
By combining neutron four-circle diffraction and polarized neutron-diffraction techniques we have determined the complex spin structures of a multiferroic YMn2O5 that exhibits two ferroelectric phases at low temperatures. The obtained magnetic structure has spiral components in both the low-temperature ferroelectric phases that are magnetically commensurate and incommensurate, respectively. Among proposed microscopic theories for the magnetoelectric coupling, our results are consistent with both the spin-current mechanism and the magnetostriction mechanism. Our results also explain why the electric polarization changes at the low-temperature commensurate-to-incommensurate phase transition.
키워드
ferroelectric materials; ferroelectric transitions; ferromagnetic materials; magnetoelectric effects; magnetostriction; multiferroics; neutron diffraction; yttrium compounds; NEUTRON-DIFFRACTION; PHASE-TRANSITIONS; FERROELECTRICITY; POLARIZATION; REVERSAL
- 제목
- Spiral spin structures and origin of the magnetoelectric coupling in YMn2O5
- 저자
- Kim, J.-H.; Lee, S.-H.; Park, S. I.; Kenzelmann, M.; Harris, A. B.; Schefer, J.; Chung, J.-H.; Majkrzak, C. F.; Takeda, M.; Wakimoto, S.; Park, S. Y.; Cheong, S.-W.; Matsuda, M.; Kimura, H.; Noda, Y.; Kakurai, K.
- 발행일
- 2008-12
- 유형
- Article
- 권
- 78
- 호
- 24
- 언어
- ENG
- 출판사
- AMER PHYSICAL SOC
- 발행국가
- 미국
- ISSN
- E 2469-9969
P 2469-9950