Interlayer Exchange Coupling Mediated by Valence Band Electrons

Details Interlayer Exchange Coupling Mediated by Valence Band Electrons Interlayer Exchange Coupling Mediated by Valence Band Electrons

2000-11-08

arxiv.org/abs/cond-mat/0011135v1

Physics

Condensed Matter

8 pages, 6 figures, to be submitted to Phys.Rev.B

Scientific paper

10.1103/PhysRevB.64.045302

The interlayer exchange coupling mediated by valence band electrons in all-semiconductor IV-VI magnetic/nonmagnetic superlattices is studied theoretically. A 3D tight-binding model, accounting for the band and magnetic structure of the constituent superlattice components is used to calculate the spin-dependent part of the total electronic energy. The antiferromagnetic coupling between ferromagnetic layers in EuS/PbS superlattices is obtained, in agreement with the experimental evidences. The results obtained for the coupling between antiferromagnetic layers in EuTe/PbTe superlattices are also presented.

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