Journal
PHYSICAL REVIEW LETTERS
Volume 98, Issue 26, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.98.267001
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The superconducting state can be influenced by injecting spin-polarized current in a controlled manner by properly tailoring the interfacial transmittivity between a ferromagnet (F) and a superconductor (S), resulting in a large magnetoresistance of over 1100% for a F/I/S/I/F multilayer system (I insulator). Because of the competition between ferromagnetism and superconductivity, the superconducting transition temperature (T-C) in the spin-parallel configuration is shifted below that in the spin antiparallel configuration. The T-C shift is attributed to ferromagnet-induced nonequilibrium spin carriers in the superconductors.
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