Magnetic Excitation in Singlet-Ground-State System CsFeCl_3
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概要
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Effects of magnetic fields on the magnetic excitation of hexagonal singlet-ground-state magnet CsFeCl_3 are studied on the basis of the dynamical correlated-effective-field theory. First, the single-ion anisotropy energy D and the intrachain (interchain) exchange integral J_1(J_2) are determined so as to reproduce the observed magnon energies of particular k-points at T=5 K : D=14cm^<-1>, J_1=2.59cm^<-1> and J_2=-0.14 cm^<-1>. The value of D is almost the same as that of RbFeCl_3, but the magnitudes of J_1 and J_2 are smaller than those of RbFeCl_3. The calculated field dependence of the magnon energies at the Brillouin zone center agrees well with the experimental data obtained by ESR measurements. The magnetic excitation of CsFeBr_3 with antiferromagnetic intrachain exchange interaction is also calculated and the results are compared with those of CsFeCl_3.
- 社団法人日本物理学会の論文
- 1995-06-15
著者
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Suzuki Naoshi
Department Of Material Phsics Faculty Of Engineering Science Osaka University
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Makino Junichi
Department of Material Physics, Faculty of Engineering Science, Osaka University
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Makino Junichi
Department Of Material Physics Faculty Of Engineering Science Osaka University
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