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Exchange coupling and ballistic current-perpendicular-to-plane giant magnetoresistance in magnetic trilayers: mutual intercorrelations

1997; IOP Publishing; Volume: 9; Issue: 34 Linguagem: Inglês

10.1088/0953-8984/9/34/007

1361-648X

S. Krompiewski, M. Zwierzycki, U. Krey,

Physics of Superconductivity and Magnetism

It is shown that the current-perpendicular-to-plane giant-magnetoresistance (CPP-GMR) oscillations, in the ballistic regime, are strongly correlated with those of the exchange coupling (J). Both the GMR and J are treated on an equal footing within a rigorously solvable tight-binding single-band model. The strong correlation consists in an asymptotic sharing of the same period, determined by the Fermi surface, and oscillations with varying spacer thickness predominantly in opposite phases.