摘要
Co2 FeSi crystallizes in the ordered L 21 structure as proven by x-ray diffraction and Mö Β bauer spectroscopy. The magnetic moment of Co2 FeSi was measured to be about 6 μB at 5 K. Magnetic circular dichroism spectra excited by soft x-rays were taken to determine the element-specific magnetic moments of Co and Fe. The Curie temperature was measured with different methods to be (1100±20) K. Co2 FeSi was found to be the Heusler compound as well as the half-metallic ferromagnet with the highest magnetic moment and Curie temperature. © 2006 American Institute of Physics.