title: Superconducting spin switch with infinite magnetoresistance induced by an internal exchange field.
abstract: 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.
authors.affiliation: Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. libin@mit.edu
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Niklas
authors.initials: N
authors.lastname: Roschewsky
authors.forename: Badih A
authors.initials: BA
authors.lastname: Assaf
authors.forename: Marius
authors.initials: M
authors.lastname: Eich
authors.forename: Marguerite
authors.initials: M
authors.lastname: Epstein-Martin
authors.forename: Don
authors.initials: D
authors.lastname: Heiman
authors.forename: Markus
authors.initials: M
authors.lastname: Münzenberg
authors.forename: Jagadeesh S
authors.initials: JS
authors.lastname: Moodera