Andreev experiments on superconductor/ferromagnet point contacts

TL;DR

This paper explores how Andreev reflection can be used to measure spin polarization in superconductor/ferromagnet contacts, comparing models and analyzing parameter dependencies to improve understanding of spin transport.

Contribution

It introduces a comparative analysis of models for extracting spin polarization from Andreev reflection data and examines how contact parameters influence the measurements.

Findings

Different models yield varying P values

Contact parameters significantly affect P measurements

Model comparison improves accuracy of spin polarization estimation

Abstract

Andreev reflection is a smart tool to investigate the spin polarisation P of the current through point contacts between a superconductor and a ferromagnet. We compare different models to extract P from experimental data and investigate the dependence of P on different contact parameters.