| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-881 - C8-882 | |
| DOI | https://doi.org/10.1051/jphyscol:19888399 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-881-C8-882
DOI: 10.1051/jphyscol:19888399
1 Silesian University, Institute of Physics, ul. Uniwersytecka 4, 40007 Katowice, Poland
2 International Laboratory of High Magnetic Fields and Low temperatures, ul. Próchnika 95, 53529 Wrockaw, Poland
J. Phys. Colloques 49 (1988) C8-881-C8-882
DOI: 10.1051/jphyscol:19888399
DOUBLE-EXCHANGE INTERACTION AS THE MAIN MECHANISM DRIVING A VERY STRONG FERROMAGNETIC COUPLING IN THE SPINEL SYSTEM Cd1-xCuxCr2Se4
J. Krok-Kowalski1, J. Warczewski1 et T. Mydlarz21 Silesian University, Institute of Physics, ul. Uniwersytecka 4, 40007 Katowice, Poland
2 International Laboratory of High Magnetic Fields and Low temperatures, ul. Próchnika 95, 53529 Wrockaw, Poland
Abstract
Each Cu+ ion introduced in place of a Cd++ ion in the tetrahedral sublattice of the spinels under study causes a transformation of a Cr3+ ion into a Cr4+ ion in the octahedral sublattice. It follows, that apart from the superexchange interaction there appears in these compounds a double exchange interaction which consists in a jump of an electron between Cr3+ and Cr4+ and brings a strong ferromagnetic coupling.