Abstract
Etude du spectre d'onde de spin d'un super-reseau compose d'une alternance de deux films ferromagnetiques, avec un couplage antiferromagnetique aux interfaces. Selon la valeur de la temperature et du champ magnetique externe applique, ce systeme peut exister dans quatre phases distinctes. Analyse de la dependance des modes d'onde de spin vis-a-vis de la temperature et du champ, dans 3 de ces phases
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