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Half-metallic ferromagnetism with high magnetic moment and high Curie temperature in Co2FeSi

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Wurmehl, S., Fecher, G. H., Ksenofontov, V., Casper, F., Stumm, U., Felser, C., et al. (2006). Half-metallic ferromagnetism with high magnetic moment and high Curie temperature in Co2FeSi. Journal of Applied Physics, 99(8): 08J103, pp. 1-4. doi:10.1063/1.2167330.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0018-66F8-3
Abstract
Co2FeSi crystallizes in the ordered L2(1) structure as proven by x-ray diffraction and Mo beta bauer spectroscopy. The magnetic moment of Co2FeSi was measured to be about 6 mu(B) 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. Co2FeSi was found to be the Heusler compound as well as the half-metallic ferromagnet with the highest magnetic moment and Curie temperature. (C) 2006 American Institute of Physics.