Thermal Expansion and Dielectric Properties of Triangular Lattice Antiferromagnet RbCoBr
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概要
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Thermal expansion and dielectric measurements of RbCoBr<inf>3</inf>were performed to examine the lattice distortion accompanied by structural phase transitions. It was confirmed that RbCoBr<inf>3</inf>undergoes structural phase transitions at 90, 37, and 10 K because its linear thermal expansion and the temperature dependence of its linear thermal expansion coefficients showed clear anomalies at these temperatures. The pyroelectric charge measurement showed that a spontaneous electric polarization appears between 37 and 31 K and below 10 K. We propose a successive structural phase transition sequence and crystal symmetries at each phase.
- 2013-07-15
著者
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Iio Katsunori
Department Of Physics (cond. Mat. Phys.) Graduate School Of Science And Engineering Tokyo Institute
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Mitsui Toshiharu
Faculty Of Pharmaceutical Sciences Teikyo University
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Kato Tetsuya
Faculty Of Education Chiba University
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Kato Tetsuya
Faculty of Education, Chiba University, Chiba 273-8522, Japan
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Nishiwaki Yoichi
Department of Basic Sciences, Saitama Medical University, Moroyama, Saitama 350-0495, Japan
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Yamaguchi Toshihisa
School of Science of Engineering, Meisei University, Hino, Tokyo 191-8506, Japan
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Takashige Masaaki
School of Science of Engineering, Meisei University, Hino, Tokyo 191-8506, Japan
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Iio Katsunori
Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
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