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Optical Spectra of EuP 5 O 14 between 77 and 583 K
Author(s) -
Sekita M.,
Minami F.,
Okamoto E.,
Masui H.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221010137
Subject(s) - oscillator strength , spectral line , absorption spectroscopy , polarization (electrochemistry) , atomic physics , crystal (programming language) , analytical chemistry (journal) , absorption (acoustics) , chemistry , single crystal , materials science , molecular physics , physics , crystallography , optics , chromatography , computer science , programming language , astronomy
The polarized absorption and fluorescence spectra of Eu 3+ in a single crystal of EuP 5 O 14 are studied from 77 to 583 K. The energy levels and eigenvectors are presented for septet and quintet states of Eu 3+ in an intermediate coupling scheme. Values of E 1 = 6420.08, E 2 = 26.12, E 3 = 765.93, and ζ = 1290.13 cm −1 are found to give the best overall agreement between the observed and calculated energy levels. The change in spectral structure is observed in the 7 F 0 to 5 D 2 absorption spectra at temperatures between 297 and 583 K. This change is attributed to the structural phase transition of the crystal by observing the temperature dependence of degree of polarization and of the oscillator strength of the lines.