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Magnetic properties and Curie temperatures of disordered Heusler compounds: Co1+xFe2-xSi

MPG-Autoren
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Fischer,  Julia Erika
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Karel,  Julie
Julie Karel, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Adler,  Peter
Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Ouardi,  Siham
Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Fecher,  Gerhard H.
Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser,  Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Fischer, J. E., Karel, J., Fabbrici, S., Adler, P., Ouardi, S., Fecher, G. H., et al. (2016). Magnetic properties and Curie temperatures of disordered Heusler compounds: Co1+xFe2-xSi. Physical Review B, 94(2): 024418, pp. 1-8. doi:10.1103/PhysRevB.94.024418.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002B-2479-D
Zusammenfassung
The local atomic environments and magnetic properties were investigated for a series of Co1+xFe2-xSi (0 <= x <= 1) Heusler compounds. While the total magnetic moment in these compounds increases with the number of valance electrons, the highest Curie temperature (T-C) in this series was found for Co1.5Fe1.5Si, with a TC of 1069 K (24 K higher than the well-known Co2FeSi). Fe-57 Mossbauer spectroscopy was used to characterize the local atomic order and to estimate the Co and Fe magnetic moments. Consideration of the local magnetic moments and the exchange integrals is necessary to understand the trend in T-C.