Nuclear Spin-Lattice Relaxation Associated with Two-Magnon Bound States in S=1/2 Ferromagnetic Ising-Like Linear Chain

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概要

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• In the S=1/2 ferromagnetic Ising-like linear chain, it is expected that thetwo-magnon bound states are excited thermally together with the single magnons.A new mechanism of the nuclear spin-lattice relaxation in this system is studied.It is associated with the scattering of a spin wave and a two-magnon bound stateaccompanied by the nuclear-=spin flip. The relaxation rate is derived under theassumption that the two-magnon bound state behaves like a boson. It provesthat the second-order exchange-scattered process makes a significant contributionto the total relaxation rate. The calculated relaxation times for proton and "Clin one-dimensional Ising-like system; [(CH.).NH]CoCl.-2H.0 agree well withthe zero-field experimental data in the order of magnitude as well as in the qualita-tive nature of the temperature dependence.

• 社団法人日本物理学会の論文
• 1978-09-15

著者

• Goto Takao

  Physics Laboratory School Of Liberal Arts And Sciences Kyoto University

• Goto Takao

  Physics Laboratory College Of General Education Kyoto University

• Goto Takao

  Physics Laborarory Colledge Fo Liberal Arts And Science Kyto Universiy

関連論文

• Anomaly in the Angular Dependence of Proton Spin Lattice Relaxation Time in CoCl_2・2H_2O
• Nuclear Spin-Lattice Relaxation Associated with Two-Magnon Bound States in S=1/2 Ferromagnetic Ising-Like Linear Chain
• Proton Spin-Lattice Relaxation in a Quasi-Two-Dimensional,Ferromagnetic Heisenberh System:(CH_3NH_3)_2CuCl_4
• Proton Spin Lattice Relaxation by Ising Spin Excitation in CoCl_2 2H_2O
• Study of Nuclear Spin-Lattice Relaxation of ^1H and ^Cl in Low-Dimensional Ising-like System ;[(CH_3)_3NH]CoCl_3・2H_2o
• Proton N.M.R. of CoCl_22H_2O under High Magnetic Field

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