Ferroelectricity and magnetoelectric coupling in <i>h</i>-YbMnO3: Spin reorientation and defect effect
Gang QiangShanghai University Materials Genome Institute and Department of Physics, , Shanghai 200444, ChinaYifei FangShanghai University Materials Genome Institute and Department of Physics, , Shanghai 200444, ChinaXiaowen LuShanghai University Materials Genome Institute and Department of Physics, , Shanghai 200444, ChinaShixun CaoShanghai University Materials Genome Institute and Department of Physics, , Shanghai 200444, ChinaJincang ZhangShanghai University Materials Genome Institute and Department of Physics, , Shanghai 200444, China
2016en
ABI
Аннотация
Low-temperature magnetic and electric properties in hexagonal multiferroic compound YbMnO3 were studied. The Mn3+ spin moments order at TN = 85 K and reoriented around 43.5 K, leading to the magnetic phase transition from B2(P63cm) → A2(P63cm). The concomitant ferroelectric polarization is observed and explained microscopically by the destruction of initial symmetric relationship of the polarization between the upper and lower half of the magnetic unit cell. The asymmetry of the polarization vs temperature curves under opposite poling voltage revealed the pinning effect of the defects on the electrical polarization.
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