Neutron Diffraction Study in One-Dimensional Antiferromagnet KCuF_3
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概要
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In order to examine the universal nature in quasi-one-dimensional magnetic system, a detailed neutron-diffraction investigation of the magnetic properties of antiferromagnet KCuF_3 has been carried out. A qualitative analysis of the wave-vector-dependent susceptibility above the Neel temperature has been performed near the (001) position in reciprocal space. The topological features of the (001) diffuse peak were utilized to ascertain the one-dimensional nature and the relative values of J_c and J_a, intra- and interchain exchange interaction, respectively. On applying a resolution-correction procedure we obtain J_a/J_c=0.027±0.005 at 39.800 K. On the other hand, below T_N the sublattice magnetization is found to follow the power law M_T/M_0=D(1-T/T_N)^β, with D=1.53±0.05, T_N=39.51±0.02 K and β=0.355±0.010, for the temperature interval 0.001<T_N-T/T_N<0.1. The exponent β is in excellent agreement with the three-dimensional spin-half isotropic Heisenberg value 0.354. And for T/T_N<0.65 the temperature variation of sublattice magnetization is found to follow the T^2-law.
- 社団法人日本物理学会の論文
- 1973-09-05
著者
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HIRAKAWA Kinshiro
Institute for Solid State Physics,University of Tokyo
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Hirakawa Kinshiro
The Institute For Solid State Physics The University Of Tokyo
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Hirakawa Kinshiro
The Institute For Solid State Physics University Of Tokyo
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Ikeda Hironobu
The Institute For Solid State Physics The University Of Tokyo
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Hirakawa Kinshiro
The Institute For State Physics The University Of Tokyo
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Hirakawa Kinshiro
The Institute Of Solid State Physics The University Of Tokyo
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Hirakawa Kinshiro
Instiute For Solid State Physics University Of Tokyo
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Hirakawa Kinshiro
Institure For Solid State Physics University Of Tokyo
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