Seebeck coefficients of half-metallic ferromagnets

TL;DR

This study investigates the Seebeck coefficients of Co2-based Heusler compounds, revealing their half-metallic ferromagnetic nature and potential for spin voltage generation through experimental and theoretical analysis.

Contribution

It provides new experimental data on Seebeck coefficients and confirms the half-metallic ferromagnetic properties of these compounds through band structure calculations.

Findings

Compounds are confirmed to be half-metallic ferromagnets.

Seebeck coefficients measured up to 900 K.

Magnetic properties and Curie temperatures determined.

Abstract

In this report the Co2 based Heusler compounds are discussed as potential materials for spin voltage generation. The compounds were synthesized by arcmelting and consequent annealing. Band structure calculations were performed and revealed the compounds to be half-metallic ferromagnets. Magnetometry was performed on the samples and the Curie temperatures and the magnetic moments were determined. The Seebeck coefficients were measured from low to ambient temperatures for all compounds. For selected compounds high temperature measurements up to 900 K were performed.