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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.
