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Far‐infrared absorption of BaF 2 :Dy 3+ versus concentration
Author(s) -
Villermainlecolier G.,
Morlot G.,
Roger A.,
Hadni A.
Publication year - 1979
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.2220960212
Subject(s) - trigonal crystal system , ion , atomic physics , infrared , line (geometry) , vibration , absorption (acoustics) , analytical chemistry (journal) , absorption spectroscopy , chemistry , materials science , physics , crystallography , optics , crystal structure , geometry , mathematics , organic chemistry , chromatography , quantum mechanics
In the BaF 2 :Dy 3+ FIR spectrum the vibration frequencies of the interstitial compensation ion F i is observed and the presence of some cluster types is revealed for concentrations equal to or higher than 0.4 mol%. A 125 cm −1 line is observed for the first time with Dy 3+ . In BaF 2 :Nd 3+ and BaF 2 :Ho 3+ studies it is previously ascribed to the F i vibration longitudinal mode in a trigonal site. Calculation gives 135 cm −1 for the transversal mode vibration; experimentally it is observed for the first time. The 42 cm −1 line previously ascribed to an electronic transition of Dy 3+ in trigonal site disappears when the concentration increases.