Effect of Internal Magnetic Field on the Optical Spectra of Sm^<3+> Ion in TbPO_4, YPO_4 and Their Mixed Crystals
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概要
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The emission and excitation spectra and their polarization properties of Sm^<3+> ion doped as a probe ion in Tb_<1-x>Y_xPO_4(x=0-1) crystals were investigated. Some of Kramers' doublet states of Sm^<l3+> ion which is degenerate in YPO_4 is split in TbPO_4. The ^4G_<5/2<⟷^6H_<5/2> transition was investigated in detail as a typical case. The separation between split states becomes gradually smaller with raising temperature, but the splitting remains even up to 200°K. It is concluded that this splitting is caused by the magnetic interaction between an Sm^<3+> ion and Tb^<3+> ions, and that it is due to the short range ordering and probably of the exchange type. The manners of the change of the polarization properties as well as of the separation width with Tb^<3+> concentration can be explained well with the assumption that the internal magnetic field has the parallel and perpendicular components both increasing in proportion to Tb^<3+> concentration.
- 社団法人日本物理学会の論文
- 1971-05-05
著者
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Shionoya Shigeo
The Institute for Solid State Physics, The University of Tokyo
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Shionoya Shigeo
The Institute For Solid State Physics The University Of Tokyo
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Hirano Masahiro
The Institute For Solid State Physics The University Of Tokyo
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