| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-847 - C8-848 | |
| DOI | https://doi.org/10.1051/jphyscol:19888382 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-847-C8-848
DOI: 10.1051/jphyscol:19888382
1 DRP UA-CNRS 71, Université Paris 6, 75252 Paris Cedex 05, France
2 UA-CNRS 807, Université du Maine, BP 535, 72017 Le Mans Cedex, France
J. Phys. Colloques 49 (1988) C8-847-C8-848
DOI: 10.1051/jphyscol:19888382
VIBRATIONAL EFFECTS ON THE MAGNETIC PROPERTIES OF HIGH-SPIN Fe2+ IN OCTAHEDRAL D4h SITES
F. Varret1 et A. Ducouret-Cereze21 DRP UA-CNRS 71, Université Paris 6, 75252 Paris Cedex 05, France
2 UA-CNRS 807, Université du Maine, BP 535, 72017 Le Mans Cedex, France
Abstract
We used a dynamic crystal-field formalism to describe the magnetic properties of Fe2+ in K2ZnF4 in which the lowest orbital states of Fe2+ (5D) are Eg and B2g (ground state). True Jahn-Teller effect inside Eg (involving vibrational modes b1g and b2g) and pseudo Jahn-Teller effect between B2g and Eg (involving vibrational mode eg) were treated with linear coupling models, together with spin-orbit coupling (exact diagonalization in a "spin-orbit-vibrations" basis).