Half-metallic ferromagnetism with high magnetic moment and high Curie temperature in Co$_2$FeSi

Sabine Wurmehl; Gerhard H. Fecher; Vadim Ksenofontov; Frederick Casper; Ullrich Stumm; Claudia Felser; Hong-Ji Lin

doi:10.1063/1.2167330

paper

Half-metallic ferromagnetism with high magnetic moment and high Curie temperature in Co $_{2}$ FeSi

arXiv:cond-mat/0511463 · doi:10.1063/1.2167330

Abstract

Co $_{2}$ FeSi crystallizes in the ordered L2 $_{1}$ structure as proved by X-ray diffraction and Mößbauer spectroscopy. The magnetic moment of Co $_{2}$ FeSi was measured to be about $6 μ_{B}$ at 5K. Magnetic circular dichroism spectra excited by soft X-rays (XMCD) were taken to determine the element specific magnetic moments of Co and Fe. The Curie temperature was measured with different methods to be ( $1100 \pm 20$ )K. Co $_{2}$ FeSi was found to be the Heusler compound as well as the half-metallic ferromagnet with the highest magnetic moment and Curie temperature.

conference contribution, MMM2005

Half-metallic ferromagnetism with high magnetic moment and high Curie temperature in Co2​FeSi

Abstract

Half-metallic ferromagnetism with high magnetic moment and high Curie temperature in Co $_{2}$ FeSi