Transport spin polarization of Ni_xFe_{1-x}: electronic kinematics and band structure

Preprint

9 November 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9905097

Abstract

We present measurements of the transport spin polarization of Ni_xFe_{1-x} (0<x<1) using the recently-developed Point Contact Andreev Reflection technique, and compare them with our first principles calculations of the spin polarization for this system. Surpisingly, the measured spin polarization is almost composition-independent. The results clearly demonstrate that the sign of the transport spin polarization does not coincide with that of the difference of the densities of states at the Fermi level. Calculations indicate that the independence of the spin polarization of the composition is due to compensation of density of states and Fermi velocity in the s- and d- bands.

Keywords

All Related Versions

Version 1, 1999-05-07, ArXiv
Version 2, 1999-11-09, ArXiv
Published version: Physical Review B, 61 (6), R3788.

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