A Simultaneous Magneto-Dielectric Phase Transition in RbCoBr_3(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We have modeled magneto-dielectric phase transitions in ABX_3-type layered triangular lattice compounds. The model consists of a spin system (magnetic transition) and a lattice system (dielectric transition). Magnetic exchange interactions are supposed to change with a relative position between two spins. This assumption produces an effective coupling between the lattice and the spin. Applying the nonequilibrium relaxation method, we have found that a simultaneous magneto-dielectric phase transition occurs when energy scales of the spin part and the lattice part coincide. An intermediate phase like the partial disordered phase disappears. Both systems relax frustration of the other system cooperatively and realize ordered states.
- 社団法人日本物理学会の論文
- 2004-01-15
著者
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SHIRAHATA Takashi
Department of Chemistry and Materials Science, Tokyo Institute of Technology
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Nakamura Tota
Department Of Physics Tokyo Institute Of Technology
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Nakamura Tota
Department Of Applied Physics Tohoku University
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Shirahata Takashi
Department Of Applied Physics Tohoku University
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Shirahata Takashi
Department Of Applied Chemistry Graduate School Of Science And Engineering Ehime University
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