期刊
PHYSICAL REVIEW B
卷 83, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.060403
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资金
- MEXT, Japan [19052001]
- JSPS, Japan [217961]
- Grants-in-Aid for Scientific Research [19052001] Funding Source: KAKEN
It has been pointed out that domain walls (DW's) in spin-induced ferroelectrics play an important role in enhancing their magnetoelectric coupling, similar to the large magnetic permeability at around the coercive force in a ferromagnet. Here we report a systematic variation of the effect of 90 degrees DW's on the magnetocapacitance in a series of helimagnetic multiferroic cocrystals Tb1-xDyxMnO3, which separate two regions with both the spin rotating planes and the ferroelectric polarization differing by 90 degrees. We have also found a systematic switch of the rotation directions of the ferroelectric polarization in a canted magnetic field. The results are well explained by taking account of the thickness-dependent mobility of DW's.
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