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Spin injection in mesoscopic silver wires: experimental test of resistance mismatch.

作者信息

Godfrey Ryan, Johnson Mark

机构信息

Naval Research Laboratory, Washington, DC 20375, USA.

出版信息

Phys Rev Lett. 2006 Apr 7;96(13):136601. doi: 10.1103/PhysRevLett.96.136601. Epub 2006 Apr 5.

DOI:10.1103/PhysRevLett.96.136601
PMID:16712013
Abstract

The spin polarization of current injected from a Permalloy electrode into a mesoscopic Ag wire is measured for samples with very low interface resistance. The observed value of 22.3% +/- 1.6% at 79 K is an order of magnitude larger than values previously reported for low resistance interfaces and about 4 times larger than predictions of the common resistance mismatch model. These results demonstrate that high resistance barriers are not necessary for efficient spin injection.

摘要

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