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Electron paramagnetic resonance and relaxation study of copper (II) and silver (II) in CsCdF3 single crystals

Published in Journal of Chemical Physics. 1993, vol. 99, no. 9, p. 6378-6383
Abstract 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 Ag2+ by x raying the corresponding samples. Cu2+ and Ag2+ were shown to present in their ground state a pseudostatic Jahn–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 n1.9) was determined for the temperature dependence of the reorientation frequency between 30 and 90 K.
Keywords Electron spin resonanceRelaxationCesium fluoridesCadmium fluorides,MonocrystalsCopper ions,Silver ionsCationsReorientationTemperature dependenceTemperature range 0013-0065 kTemperature range 0065-0273 kTernary compoundsSpin-lattice relaxation
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Research group Groupe Bill
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MINNER, Edith, LOVY, Dominique, BILL, Hans. Electron paramagnetic resonance and relaxation study of copper (II) and silver (II) in CsCdF3 single crystals. In: Journal of Chemical Physics, 1993, vol. 99, n° 9, p. 6378-6383. doi: 10.1063/1.465876 https://archive-ouverte.unige.ch/unige:2904

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Deposited on : 2009-09-21

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