Enhancement of Magnetic Frustration Caused by Zn Doping in Quasi-One-Dimensional Quantum Antiferromagnet Cu_3Mo_2O_9(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We studied the effects of Zn doped into Cu sites on the magnetism of Cu_3Mo_2O_9. The spin system consists of spin-1/2 antiferromagnetic (AF) uniform chains and AF dimers. Each chain is coupled to neighboring dimers by other interactions, giving rise to magnetic frustration. A component parallel to the chain of magnetic moment in the chain forms AF long-range order (LRO) below the transition temperature T_N, whereas a perpendicular component is disordered in zero magnetic field and above 2.0 K. The perpendicular component forms weak ferromagnetic LRO (WF-LRO) only in finite magnetic fields H's. We have found that WF-LRO in H disappears with a very small amount of Zn doping, although the decrease of T_N is negligible at corresponding Zn concentrations. These results are explained by the enhancement of magnetic frustration among symmetric exchange interactions caused by Zn doping.
- 社団法人日本物理学会の論文
- 2008-03-15
著者
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黒江 晴彦
上智大理工
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関根 智幸
上智大理工
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関根 智幸
上智大理工:crest-jst
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Kitazawa Hideaki
National Institute For Materials Science
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Kitazawa Hideaki
National Institute For Materials Science (nims)
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Kitazawa Hideaki
National Institute For Material Science
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KUROE Haruhiko
Department of Physics, Sophia University
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HASE Masashi
National Institute for Materials Science (NIMS)
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OZAWA Kiyoshi
National Institute for Materials Science (NIMS)
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HAMASAKI Tomoaki
Department of Physics, Sophia University
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SEKINE Tomoyuki
Department of Physics, Sophia University
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Kuroe Haruhiko
Department Of Physics Sophia University
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Ozawa Kiyoshi
物質・材料研究機構
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Ozawa Kiyoshi
National Institute For Materials Science
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Hamasaki Tomoaki
Department Of Physics Sophia University
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Sekine Tomoyuki
Department Of Physics Faculty Of Science And Technology Sophia University
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Sekine Toshiaki
Department Of Radioisotopes Japan Atomic Energy Research Institute
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