Superconducting spin switch with infinite magnetoresistance induced by an internal exchange field

Superconducting spin switch with infinite magnetoresistance induced by an internal exchange field

A theoretical prediction by de Gennes suggests that the resistance in a FI/S/FI (where FI is a ferromagnetic insulator, and S is a superconductor) structure will depend on the magnetization direction of the two FI layers. We report a magnetotransport measurement in a EuS/Al/EuS structure, showing th...

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Bibliographic Details
Published in:Physical review letters Vol. 110; no. 9; p. 097001
Main Authors: Li, Bin, Roschewsky, Niklas, Assaf, Badih A, Eich, Marius, Epstein-Martin, Marguerite, Heiman, Don, Münzenberg, Markus, Moodera, Jagadeesh S
Format: Journal Article
Language:English
Published: United States American Physical Society 25-02-2013
Online Access:Get full text
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Summary:A theoretical prediction by de Gennes suggests that the resistance in a FI/S/FI (where FI is a ferromagnetic insulator, and S is a superconductor) structure will depend on the magnetization direction of the two FI layers. We report a magnetotransport measurement in a EuS/Al/EuS structure, showing that an infinite magnetoresistance can be produced by tuning the internal exchange field at the FI/S interface. This proximity effect at the interface can be suppressed by an Al(2)O(3) barrier as thin as 0.3 nm, showing the extreme confinement of the interaction to the interface giving rise to the demonstrated phenomena.
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USDOE
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.110.097001