Theoretical Studies of an Absorption Spectrum of an Antiferromagnetic Rare-Earth Garnet, Dy_3Al_5O_<12>

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概要

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• Crystal field calculations have been performed on the ^6F_<3/2>, ^6F_<5/2>, ^6F_<7/2>, ^6H_<5/2> and ^6H_<15/2> states of the Dy^<3+> ion in the paramagnetic state. The optical absorption spectra for the transition ^6H_<15/2>⇾^6F_<5/2> have also been studied in detail. The results indicate that the signs of some of the crystal field parameters V_n^m based on a point charge calculation have to be changed in order to reproduce the observed level positions and g values of the ^6F_<5/2> state. Such change of the crystal field parameters may be ascribed to large shielding of the crystal field potential. The selection rules derived in the present paper are consistent with the ones obtained in the preceding paper. The theoretical selection rules have been applied successfully to the splittings of the ^6F_<5/2> and ^6H_<15/2> states below the Neel temperature by using the molecular field approximation. The magnetic-field effect on the absorption lines below the spin-flop field has also been discussed.

• 社団法人日本物理学会の論文
• 1969-07-05

著者

• WASHIMIYA Shuko

  Broadcasting Science Research Laboratories of Nippon Hoso Kyokai

関連論文

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• Effective Hamiltonian for Non-Kramers Ion Pairs
• Exciton Absorption Lines in Antiferromagnetic YCrO_3
• Theoretical Studies of an Absorption Spectrum of an Antiferromagnetic Rare-Earth Garnet, Dy_3Al_5O_
• Molecular Field Theory of Magnetization in Rare Earth Orthochromites and Orthoferrites : Application to GdCrO_3

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