paper

Magnetocapacitance: A probe of spin-dependent potentials

arXiv:cond-mat/0206427 · doi:10.1103/PhysRevLett.90.117201

Abstract

The magnetic field dependence of the capacitance of Pd-AlOx-Al thin-film structures has been measured. The observed quadratic dependence of capacitance on magnetic field is consistent with a theoretical model that includes the effect of a spin-dependent electrochemical potential on electron screening in the paramagnetic Pd. This spin-dependent electrochemical potential is related to the Zeeman splitting of the narrow d-bands in Pd. The quantitative details depend on the electronic band structure at the surface of Pd.

4 pages, 3 figures

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