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Compensation of Trivalent Europium and Ytterbium Ions in Calcium Fluoride by Interstitial Hydride Ions
Author(s) -
Chambers D. N.,
Newman R. C.
Publication year - 1969
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.19690350218
Subject(s) - europium , ytterbium , hydride , ion , fluoride , hydrogen , absorption (acoustics) , inorganic chemistry , materials science , irradiation , doping , chemistry , physics , optoelectronics , organic chemistry , nuclear physics , composite material
Hydrogen has been diffused into calcium fluoride crystals doped with Eu, Yb and other Rare Earths. The local mode absorption from H − ions has been measured before and after X‐ or γ‐irradiations and a detailed study has been made of the new electronic transitions of Yb 3+ ions near 1 μm which appear after the irradiation. It is concluded that for Eu and Yb dopings, RE 3+ —H − (i) pairs are produced which are thermally unstable. In CaF 2 :Yb crystals, a second centre involving two hydride ions has also been identified.