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Superconductive tunneling study of the spin-filter and proximity effects

โœ Scribed by Xin Hao; Jagadeesh S. Moodera; Robert Meservey

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
247 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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โœฆ Synopsis

Metal-EuS-Al junctions and EuS/Al bilayers have been studied by superconductive tunneling. In the former, the tunnel current showed a spin-polarization up to 85%, which was attributed to the splitting of the EuS conduction band. The EuS/Al bilayers displayed a large extra Zeeman splitting in the quasiparticle density of states in Al due to the exchange interaction between the conduction electrons and the localized and spontaneousely ordered EL?+ moments. From the dependence of this internal (exchange) field on the Al film thickness, the exchange constant was found to be about 13 meV.

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