Polarized neutron scattering study of spin chirality in multiferroic material HoMn $_{2}$ O $_{5}$ under electric field

Kimura, Hiroyuki*; Wakimoto, Shuichi ; Nishihata, Keisuke*; Noda, Yukio*; Kakurai, Kazuhisa; Kon, Keiichiro*

Multiferroic materials are known to show gigantic magnetoelectric effects. One of the microscopic models for polarization in such systems is based on spin chirality. We have perfoermed polarized neutron scattering experiments using HoMn $_{2}$ O $_{5}$ single crystal to study correlation between the spin chirality and ferroelectric polarization. We found that the spin chirality is absent in the high temperature paraelectric HT-ICM phase whereas it appears in the ferroelectric LT-ICM phase. This fact demonstrates a strong coupling between the spin chirality and the ferroelctric polarization.

Language	:	Japanese
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Meeting title	:	日本物理学会2007年春季大会(物性)
Held date	:	2007/03
Location (city)	:	鹿児島
Location (country)	:	日本
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Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Registration No. : BB20063291
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Polarized neutron scattering study of spin chirality in multiferroic material HoMnO under electric field

Polarized neutron scattering study of spin chirality in multiferroic material HoMn $_{2}$ O $_{5}$ under electric field