Classification and Interpretation of the Polarization of Multiferroic $R$Mn2O5
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概要
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We have collected and compared temperature-dependent polarization data of multiferroic $R$Mn2O5 for 11 kinds of rare earths ($R$) from the literature and our own measurements. Although the reported data are inconsistent, it was found that the maximum polarization values for $R=\text{Y}$, Dy, Ho, Er, and Tm are almost equal above 30 K except for the phase transition temperature where the polarization disappears. The findings suggest a standard polarization value for $R$Mn2O5 of 100–120 nC/cm2 at 30 K in a commensurate magnetic (CM) phase. We discuss the nature and issues of the measured polarization of $R$Mn2O5 from the data and our detailed measurement results for YMn2O5. Temperature-dependent ferroelectric hysteresis loops of YMn2O5 by the double-wave method reveal that an antiferroelectric-like high-temperature incommensurate magnetic (ICM) phase and a ferroelectric low-temperature ICM phase, while the intermediate CM phase is ferrielectric.
- Physical Society of Japanの論文
- 2010-05-15
著者
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Fukunaga Mamoru
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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NODA Yukio
Institute of Multidisciplinary Research for Advanced Materials
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Fukunaga Mamoru
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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