Superconducting double spin valve with extraordinary large tunable magnetoresistance

Francesco Giazotto

doi:10.1063/1.3190498

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arXiv · 0906.0300

Superconducting double spin valve with extraordinary large tunable magnetoresistance

Francesco Giazotto

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Abstract

A superconducting double spin valve device is proposed. Its operation takes advantage of the interplay between the spin-filtering effect of ferromagnetic insulators and superconductivity-induced out-of-equilibrium transport. Depending on the degree of nonequilibrium, extraordinary large tunnel magnetoresistance as large as 10^2...10^6% can be obtained for realistic material parameters, and it can be tuned over several orders of magnitude under proper voltage biasing and temperature. The relevance of this setup for low-temperature applications is further discussed.

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Francesco Giazotto. 2009-06-01. Superconducting double spin valve with extraordinary large tunable magnetoresistance. https://doi.org/10.1063/1.3190498

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