The structure and local surrounding of Fe in Co2-xFe1+xSi

Jung, Verena; Balke, Benjamin; Fecher, Gerhard H.; Felser, Claudia

doi:10.1063/1.2965463

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The structure and local surrounding of Fe in Co_2-xFe_1+xSi

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Jung, V., Balke, B., Fecher, G. H., & Felser, C. (2008). The structure and local surrounding of Fe in Co_2-xFe_1+xSi. Applied Physics Letters, 93(4): 042507, pp. 1-3. doi:10.1063/1.2965463.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-8ACC-3

Abstract

This work reports on the magnetostructural properties of Co(2-x)Fe(1+x)Si with 0 < x < 1. The Heusler compound Co(2)FeSi is a half-metallic ferromagnet with high Curie temperature and was suggested as candidate for a high tunneling magnetoresistance. Changing the Fe content allows to tune its magnetic properties. It is demonstrated that the solid solution series Co(2-x)Fe(1+x)Si is perfectly ordered. (57)Fe Mossbauer spectroscopy was used to determine the local hyperfine magnetic fields of the Fe atoms. Two different hyperfine magnetic fields are detected in samples with x > 0. Changes in the relative intensities indicate the well ordered substitution of Co by Fe atoms. (C) 2008 American Institute of Physics.