| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-1501 - C8-1502 | |
| DOI | https://doi.org/10.1051/jphyscol:19888691 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1501-C8-1502
DOI: 10.1051/jphyscol:19888691
1 Laboratoire de Physique des Solides, Bât. 510, Université Paris-Sud, 91405 Orsay, France
2 Department of Physics, Chiba University, Chiba, Japan
J. Phys. Colloques 49 (1988) C8-1501-C8-1502
DOI: 10.1051/jphyscol:19888691
MAGNETIC ENERGY IN A 2D-HEISENBERG MIXED CRYSTAL WITH COMPETING EXCHANGE INTERACTIONS : K2CuxMn1-xF4
J. P. Jamet1, J. Ferré1, I. Yamada2 et M. Itoh21 Laboratoire de Physique des Solides, Bât. 510, Université Paris-Sud, 91405 Orsay, France
2 Department of Physics, Chiba University, Chiba, Japan
Abstract
We measured the a-c temperature variation of the optical linear birefringence of mixed K2CuxMn1-xF4 single crystals for several values of x (0 < x < 1). It may be expressed as a combination of static two spin correlation functions for Cu-Cu, Mn-Mn and Cu-Mn pairs of ions. We deduce the Cu-Mn exchange integral J(Cu - Mn) ≈ -43 cm-1.