^1H-NMR Study of the Random Bond Effect in the Quantum Spin System (CH_3)_2CHNH_3Cu(Cl_xBr_<1-x>)_3(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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The spin-lattice relaxation rate T^<-1>_1 of ^1H-NMR has been measured in (CH_3)_2CHNH_3Cu(Cl_xBr_<1-x>)_3 with x=0.88, which is reportedly a gapped system with a singlet ground state from the previous macroscopic magnetization and specific heat measurements, in order to investigate the bond randomness effect microscopically in the gapped composite Haldane system (CH_3)_2CHNH_3CuCl_3. It was discovered that the spin-lattice relaxation rate T^<-1>_1 in the present system includes both fast and slow relaxation parts indicative of the gapless magnetic ground state and the gapped singlet ground state, respectively. We discuss the obtained results with the previous macroscopic magnetization and specific heat measurements together with the microscopic μSR experiments.
- 社団法人日本物理学会の論文
- 2007-08-15
著者
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Suzuki Takao
Advanced Meson Science Laboratory Riken Nishina Center
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Goto Takayuki
Department Of Physics Sophia University
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OOSAWA Akira
Department of Physics, Sophia University
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Oosawa Akira
Department Of Physics Sophia University
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Goto Takayuki
Department Of Physics Faculty Of Science And Technology Sophia University
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KANADA Keishi
Department of Physics, Sophia University
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SAITO Takehiro
Department of Physics, Sophia University
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ADACHI Tomoya
Department of Physics, Sophia University
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Kanada Keishi
Department Of Physics Sophia University
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Adachi Tomoya
Department Of Physics Sophia University
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Saito Takehiro
Department Of Physics Faculty Of Science And Technology Sophia University
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Goto Takayuki
Department of Physics, Faculty of Science and Technology, Sophia University
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OOSAWA Akira
Advanced Science Research Center, Japan Atomic Energy Research Institute
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Suzuki Takao
Advanced Meson Science Laboratory, RIKEN Nishina Center
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