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

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

2005-11-18

arxiv.org/abs/cond-mat/0511463v1

J. Appl. Phys. 99 (2006) 08J103

Physics

Condensed Matter

Materials Science

conference contribution, MMM2005

Scientific paper

10.1063/1.2167330

Co$_2$FeSi crystallizes in the ordered L2$_1$ structure as proved by X-ray diffraction and M\"o\ss bauer spectroscopy. The magnetic moment of Co$_2$FeSi was measured to be about $6\mu_B$ 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 ($1100\pm20$)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.

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