| Autor: |
Minner, E., Lovy, D., Bill, H. |
| Předmět: |
|
| Zdroj: |
Journal of Chemical Physics; 11/1/1993, Vol. 99 Issue 9, p6378, 6p |
| Abstrakt: |
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 n[bar_over_tilde:_approx._equal_to]1.9) was determined for the temperature dependence of the reorientation frequency between 30 and 90 K. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
