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EPR of BaCl 2 :Eu 2+ and BaCl 2 :Gd 3+
Author(s) -
Wever H.,
Den Hartog H. W.
Publication year - 1975
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.2220700124
Subject(s) - electron paramagnetic resonance , ion , chemistry , spectral line , liquid nitrogen , analytical chemistry (journal) , nuclear magnetic resonance , physics , organic chemistry , chromatography , astronomy
Abstract Paramagnetic resonance spectra of Eu 2+ and Gd 3+ ions at Ba 2+ sites in BaCl 2 were measured at room temperature and liquid nitrogen temperature. There was little difference between the spectra of the same ion taken at the different temperatures. The important parameters in the spin Hamiltonian are: Eu 2+ (300 °K): b 2 0 =24 × 10 −4 cm −1 , b 2 2= −450 × × 10 −4 cm −1 ; Eu 2+ (77 °K): b 2 0= 33 × 10 −4 cm −1 , b 2 2= −467 × 10 −4 cm −1 ; Gd 3+ (77 °K): b 2 0= 84 × 10 −4 cm −1 , b 2 2= −461 × 10 −4 cm −1 ; g =1.992. The corresponding theoretical values are: Eu 2+ : b 2 0= 104 × 10 −4 cm −1 , b 2 2= −357 × 10 −4 cm −1 ; Gd 3+ : b 2 0=99 × × 10 −4 cm −1 , b 2 2= −334 × 10 −4 cm −1 ; g = 1.993.