Spin-Polarized Transport and Proximity Effect in Superconductor/Ferromagnet

System

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Abstract

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Recent technological advances made it possible to create hybrid

nano-structures with high quality ferromagnet/superconductor (F/S)

interfaces. The F/S systems have been in focus of intensive experimental and

theoretical studies because of both exciting fundamental problems and

potential device applications, including quantum computers and magnetic

information storage. The electronic properties of both F and S films will be

strongly modified near the interface due to mutual proximity effect:

superconducting correlations penetrate into F; on the other hand, the spin

polarization can extend into S. Main questions to be addressed will be the

type and length scale of the induced superconducting correlations and spin

relaxation length at the interface.  In this talk, I will present two

topics. One is that measuring the spin-relaxation length in the

superconductor and the other is that magnetoresistive-switch device concept

using superconducting proximity effect in the F/S/F trilayer system.

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