Electron paramagnetic resonance and relaxation study of copper (II) and silver (II) in CsCdF3 single crystals
نویسنده
چکیده
Copper and silver, respectively, were introduced into single crystals of CsCdF3. Our detailed electron paramagnetic resonance (EPR) study showed that both elements enter the Cd lattice site-copper as Cu2+, silver as Ag+, which then was converted into AgH by x raying the corresponding samples. Cu2+ and Ai+ were shown to present in their ground state a pseudostatic J ahn-Teller effect. Motional effects were observed in the respective EPR spectra and studied in some detail for Cu2+ as they are seen over a wide temperature range. Predictions of a stochastic Kubo model [J. Phys. Soc. Jpn. 9, 935 (1954)] were compared with the temperature dependent linewidths of the motionally averaged EPR spectrum. A power law (Tn with n"", 1.9) was determined for the temperature dependence of the reorientation frequency between 30 and 90 K.
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