期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.207205
关键词
-
资金
- MEXT, Japan [19740190, 16076207, 19052001]
- Asahi Glass Foundation
- Grants-in-Aid for Scientific Research [19740190, 16076207] Funding Source: KAKEN
The relation between the orientation of the magnetic field and the flopped ferroelectric polarization has been investigated for multiferroic MnWO4. The ferroelectric single-domain state is retained across the polarization flop process when the direction of the applied magnetic field slightly deviates from the b axis within the ab plane. Furthermore, the electric polarization in the high-field P parallel to a phase is reversed when the P parallel to b-to-P parallel to a transition takes place while decreasing and increasing the magnetic fields oppositely canted from the b axis. These results indicate that the symmetry breaking induced by a canted magnetic field determines the direction of the polarization flop, which corresponds to the direction of the vector spin chirality. The stability of the magnetoelectric domain walls in a canted magnetic field play a key role in the directional control of the electric polarization flop phenomenon.
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