Vibronic Structure in Luminescence Spectra of Rare Earth Ions In SrTiO_3, BaTiO_3 and Other Perovskites
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概要
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In the luminescence spectra of Eu^<3+> in SrTiO_3, two kinds of vibronic structure, i.e, rather sharp satellite lines (vibronic lines) and asymmetric bands (vibronic tails), were found to exist. The tails were observed also in the spectra of Tb^<3+> and Pr^<3+> in SrTiO_3. The tail strongly appears associated only with transitions allowed by forccd electric dipole. A comparison of the luminescence spectra of Eu^<3+> in SrTiO_3 and BaTiO_3 has suggested the existence of a correlation between the strength of vibronic structure and the site symmetry of rare earth ions. To investigate this, the luminescence spectra of Eu^<3+> were studied in various perovskite type oxides in which the site symmetry of Eu^<3+> varies from O_h to very low symmetries. It has been clarified that the vibronic lines strongly appear when the site symmetry is O_h or very close to it. However, the vibronic tail was observed only in SrTiO_3. In order that the vibronic tail appears, some special properties of host material seem to be required.
- 社団法人日本物理学会の論文
- 1967-12-05
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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Yamamoto Hajime
The Institute For Solid State Physics The University Of Tokyo:(present)hitachi Central Research Labo
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MAKISHIMA Shoji
The Institute for Solid State Physics, The University of Tokyo
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Makishima Shoji
The Institute For Solid State Physics The University Of Tokyo
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