Possible Antiferro-Octupolar Order in Antiferromagnetic TbB_2C_2 Examined by Gd Substitution(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We have examined the effects of Gd substitution on the anomalous antiferromagnetic (AFM) properties of TbB_2C_2 having field-induced antiferro-quadrupolar (AFQ) ordered phases. The Gd substitution induces drastic changes in the magnetic properties. The AFM structure characteristic to TbB_2C_2, the anomalous increase in magnetic susceptibility below T_N, and the strong preference of AFM domains disappear with the substitution of low Gd content of less than 10%. We propose a promising assumption that an antiferro-octupolar (AFO) ordering occurs at T_N simultaneously with AFM ordering in TbB_2C_2. The fragility of anomalous properties originates in the fragility of the antiferro-octupolar interaction against the substitution of Gd^<3+> ions with L=0.
- 社団法人日本物理学会の論文
- 2006-12-15
著者
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MATSUOKA Eiichi
Department of Physics, Graduate School of Science, Tohoku University
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SASAKI Yuta
Department of Physics, Graduate School of Science, Tohoku University
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ONODERA Hideya
Department of Physics, Graduate School of Science, Tohoku University
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USUI Daichi
Department of Physics, Graduate School of Science, Tohoku University
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NAKAGAWA Masaaki
Department of Surgery, Ishikawa prefectural Central Hospital
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Onodera Hideya
Department Of Physics Graduate School Of Science Tohoku University
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Matsuoka Eiichi
Department Of Physics Graduate School Of Science Tohoku University
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Nakagawa Masaaki
Department Of Physics Graduate School Of Science Tohoku University
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Sasaki Yuta
Department Of Physics Graduate School Of Science Tohoku University
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Usui Daichi
Department Of Physics Graduate School Of Science Tohoku University
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