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Scaling of Hc2 (T) in Nb/CuMn Multilayers

A. Angrisani Armenio, L. V. Mercaldo, S. L. Prischepa, M. Salvato, C. Attanasio, L. Maritato

cond-mat.supr-conarXiv:cond-mat/0102132

Abstract

Measurements of the perpendicular upper critical magnetic field Hc2 (T) are reported for several Nb/CuMn multilayers. It is found that, despite the magnetic nature of the samples, the data for samples with low Mn percentage in the CuMn layers are simply described by the Werthamer-Helfand-Honenberg theory for conventional type-II superconductors, neglecting both Pauli spin paramagnetism and spin orbit impurity scattering. For high Mn concentration a different theoretical aprroach is needed.

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