Magnetocapacitance in Geometrically Frustrated Magnet ZnFe_2O_4(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We report the measurement of dielectric constant in ZnFe_2O_4 as a function of temperature and magnetic field. The behavior of dielectric constant for single crystals, which is dominated by the pair correlation of the neighboring Fe spins, indicates that ferromagnetic correlation is enhanced below 30 K, but is suppressed below 10 K, where positive magnetocapacitance is enhanced. It is also found that the magnetocapacitance of polycrystalline samples is much larger (∿10% at 14T) than that of single crystals, because of the additional dielectric relaxation coupled with a uniform magnetization.
- 一般社団法人日本物理学会の論文
- 2005-03-15
著者
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Suzuki Takehito
Department Of Electrical And Electronic Engineering Ibaraki University
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KATSUFUJI Takuro
Department of Advanced Materials Science, University of Tokyo
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AIKAWA Yuki
Department of Physics, Waseda University
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