Abstract
A theoretical prediction by de Gennes suggests that the resistance in a (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 structure, showing that an infinite magnetoresistance can be produced by tuning the internal exchange field at the interface. This proximity effect at the interface can be suppressed by an barrier as thin as 0.3 nm, showing the extreme confinement of the interaction to the interface giving rise to the demonstrated phenomena.
- Received 18 December 2012
DOI:https://doi.org/10.1103/PhysRevLett.110.097001
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