Andreev reflection at ferromagnet/superconductor interfaces

H. Imamura, S. Takahashi, Sadamichi Maekawa

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Andreev reflection is a scattering process where electrical current is converted to supercurrent where there is an interface between a normal metal and a superconductor. Recently, much attention has been focused on Andreev reflection in nanohybrids of ferromagnet (F) and superconductor (S). This is for a variety of reasons. Andreev reflection in a F-S point contact provides a powerful tool for determining the spin polarization of conducting electrons. The coherence length of a superconductor can be estimated by measuring the tunnel magnetoresistance of a F-S-F double junction system. A novel scattering process called crossed Andreev reflection can be predicted for a superconductor with two ferromagnetic leads, where Andreev reflection occurs even if the ferromagnetic leads are half metallic. In this chapter the theory of Andreev reflection in nanohybrids of F and S is introduced, and recent progress in this field is reviewed.

Original languageEnglish
Title of host publicationConcepts in Spin Electronics
PublisherOxford University Press
Pages1-28
Number of pages28
Volume9780198568216
ISBN (Electronic)9780191718212
ISBN (Print)9780198568216
DOIs
Publication statusPublished - 2007 Sep 1

Keywords

  • Andreev reflection
  • Crossed andreev reflection
  • Magnetoresistance
  • Nanohybrids
  • Superconductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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