NMR Study of the S=1/2 Quantum Kagome Lattice Antiferromagnet [Cu_3(titmb)_2(CH_3CO_2)_6]・H_2O(Frustrated Systems, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
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概要
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A quantum kagome lattice magnet, [Cu_3(titmb)_2(CH_3CO_2)_6]・H_2O with s=1/2 has been studied by magnetization and NMR experiments. No magnetic phase transition was observed down to 180mK. The spin-lattice relaxation rate T^<-1>_1 above 20K is almost temperature independent, while below 10K the rates decrease sharply as the temperature is decreased, and can be described as T^<-1>_1=B exp(-△/κ_BT). The field dependence on the energy gap △ has been obtained and is found to show plateaus between 3.2 and 4.5T and above 5.3T.
- 2005-10-31
著者
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OYAMADA Akira
Graduate School of Human and Environmental Studies, Kyoto University
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Kawahara Shin-ichi
Graduate School of Engineering, Osaka University
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Maegawa Satoru
Graduate School Of Human And Environmental Studies Kyoto University
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Oyamada Akira
Graduate School Of Human And Environmental Studies Kyoto University
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Yamaguchi Ryohei
Graduate School Of Human And Environmental Studies Kyoto University
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Yoshioka Kenji
Graduate School Of Human And Environmental Studies Kyoto University
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Fujita Kenichi
Graduate School Of Human And Environmental Studies Kyoto University
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KAWAHARA Shinichi
Graduate School of Human and Environmental Studies, Kyoto University
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Kawahara Shinichi
Graduate School Of Human And Environmental Studies Kyoto University
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Maegawa Satoru
Kyoto Univ. Kyoto Jpn
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FUJITA Kenichi
Graduate School of Human and Environmental Studies, Kyoto University
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YOSHIOKA Kenji
Graduate School of Human and Environmental Studies, Kyoto University
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YAMAGUCHI Ryohei
Graduate School of Human and Environmental Studies, Kyoto University
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