| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-1619 - C8-1623 | |
| DOI | https://doi.org/10.1051/jphyscol:19888741 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1619-C8-1623
DOI: 10.1051/jphyscol:19888741
Centro Brasileiro de Pesquisas Fisicas/CNPq, Rua Xavier Sigaud 150, 22290, Rio de Janeiro, RJ-Brazil
J. Phys. Colloques 49 (1988) C8-1619-C8-1623
DOI: 10.1051/jphyscol:19888741
SURFACE MAGNETIC ORDER AND EFFECTS OF THE NATURE OF THE INTERACTIONS
C. Tsallis et A. ChameCentro Brasileiro de Pesquisas Fisicas/CNPq, Rua Xavier Sigaud 150, 22290, Rio de Janeiro, RJ-Brazil
Abstract
We discuss, within a real-space renormalization-group, interesting thermal effects (surface singularity at the bulk transition ; Ising-Heisenberg crossover) concerning the free surface of a semi-infinite d = 3 spin 1/2 anisotropic Heisenberg ferromagnet. Comparison with the Mermin-Wagner theorem and with experimental work is done.