Reexamination of Magnetic Susceptibility and Spin Flop at Low-Field in KCuF_3
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概要
- 論文の詳細を見る
The exact spin-structure of KCuF_3 has been puzzling for a long time. However, recent electron paramagnetic and antiferromagneic resonance (AFMR) studies made on high-quality single crystals revealed that this compound has an eight-sublattice magnetic structure and the substantial easy direction is along [110]_p and its equivalent axes. This structure is due to the Σ_nd_<nn+1>・(S_n×S_<n+1>) interaction between nearest-neighbor spins on the c-axis ; the directions of d_<nn+1> are parallel to [100]_p and its equivalent axes, and are therefore orthogonal to each other in the c-plane. The analysis of the AFMR data suggested a spin flop from the [110]_p to [110]_p at H≃696 Oe. To confirm the spin flop, the magnetization process is investigated, and it is observed at 550 Oe. As a result, the substantial easy direction of spins suggested by the AFMR study is confirmed. In addition, the parallel and perpendicular susceptibilities, χ_<⫽> andχ_⊥, are reexamined and are discussed on the basis of a recent improved theory for a one-dimensional Heisenberg antiferromagnet.
- 社団法人日本物理学会の論文
- 1995-12-15
著者
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YAMADA Isao
Department of Physics, Faculty of Science, Chiba University
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Yamada Ichihiro
National Institute For Fusion Science
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佐々木 茂男
九州大学院理
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Yamada Isao
Department Of Communications And Integrated Systems Tokyo Institute Of Technology
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Sasaki Shinji
Department of Physics, Faculty of Science, Chiba University
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Narita Naoyuki
Department of Physics, Faculty of Science, Chiba University
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Sasaki Shinji
Department Of Physics Faculty Of Science Chiba University
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Narita Naoyuki
Department Of Physics Faculty Of Science Chiba University
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Narita N
Chiba Univ. Chiba
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Yamada Isao
Departmen Of Communications And Integrated Systems Tokyo Institute Of Technology
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SASAKI Shinji
Department of Anatomy, Keio University School of Medicine
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