| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
|
|
|---|---|---|
| Page(s) | C8-1639 - C8-1640 | |
| DOI | https://doi.org/10.1051/jphyscol:19888749 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1639-C8-1640
DOI: 10.1051/jphyscol:19888749
Department of Mathematics, City University, Northampton Sq. London EC1V 0HB, G.B.
J. Phys. Colloques 49 (1988) C8-1639-C8-1640
DOI: 10.1051/jphyscol:19888749
"PSEUDO T3/2" LAW FOR MAGNETIC SURFACES INTERFACES AND SUPERLATTICES
B. S. Ahmad, J. Mathon et M. S. PhanDepartment of Mathematics, City University, Northampton Sq. London EC1V 0HB, G.B.
Abstract
Classical spin-wave theory predicts that the surface magnetisation MS(T) decreases with temperature twice as fast as in the bulk. It is shown that this result which contradicts experiment breaks down at temperatures as low as 1 % TC. The local MS(T) above these temperatures obeys a "pseudo T3/2" law whose prefactor is determined by the local exchange. It is shown that "pseudo T3/2" law holds also for magnetic interfaces and superlattices.