Abstract
We report values of the second and fourth order spin-lattice coefficients of Gd 3+ in SrO and CdF 2 measured in uniaxial stress EPR experiments at 290°K and 32 GHz. A previous measurement in Gd 3+ in CaF 2 was repeated in order to obtain more accurate values for the fourth order coefficients. We find: G (2) 3 g = (0·21 ± 0·02) cm −1, G (2) 5 g = (−0·40±0·06) cm −1 and G (4) 1 g = (2·5±1·2) 10 −4 cm −1 for Gd 3+ in SrO; G (2) 3 g = (−0·24±0·02) cm −1, G (2) 5 g = (−0·061±0·008) cm −1, G (4) 1 g = (1·5±0·9) 10 −4 cm −1 and G (4) 3 g = (−4·6±2·9) 10 −4 cm −1 for Gd 3+ in CdF 2 and G (4) 1 g = (1·6±0·6) 10 −4 cm −1 and G (4) 3 g = (−1·9±1·2) 10 −4 cm −1 for Gd 3+ in CaF 2. These values are compared with those obtained for Gd 3+ and Eu 2+ in other cubic crystals by uniaxial and hydrostatic stress experiments.
Published Version
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