On the origin of temperature dependence of interlayer exchange coupling in metallic trilayers

Details On the origin of temperature dependence of interlayer exchange coupling in metallic trilayers On the origin of temperature dependence of interlayer exchange coupling in metallic trilayers

2004-04-29

arxiv.org/abs/cond-mat/0404700v1

Phys. Rev. B 69, 224413 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 7 figures, accepted for PRB

Scientific paper

10.1103/PhysRevB.69.224413

We study the influence of collective magnetic excitations on the interlayer exchange coupling (IEC) in metallic multilayers. The results are compared to other models that explain the temperature dependence of the IEC by mechanisms within the spacer or at the interfaces of the multilayers. As a main result we find that the reduction of the IEC with temperature shows practically the same functional dendence in all models. On the other hand the influence of the spacer thickness, the magnetic material, and an external field are quite different. Based on these considerations we propose experiments, that are able to determine the dominating mechanism that reduces the IEC at finite temperatures.

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