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

Julia Erika Fischer; Julie Karel; Simone Fabbrici; Peter Adler; Siham Ouardi; Gerhard H. Fecher; Franca Albertini; Claudia Felser

doi:10.1103/PhysRevB.94.024418

Magnetic properties and Curie temperatures of disordered Heusler compounds: Co_1+xFe_2-xSi

Julia Erika Fischer, Julie Karel, Simone Fabbrici, Peter Adler, Siham Ouardi, Gerhard H. Fecher, Franca Albertini, Claudia Felser

Research output: Contribution to journal › Article › Research › peer-review

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Abstract

The local atomic environments and magnetic properties were investigated for a series of Co_1+xFe_2-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 Co_1.5Fe_1.5Si, with a T_C of 1069 K (24 K higher than the well-known Co₂FeSi). ⁵⁷Fe Mössbauer 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.

Original language	English
Article number	024418
Number of pages	8
Journal	Physical Review B
Volume	94
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.94.024418
Publication status	Published - 1 Jul 2016
Externally published	Yes

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abstract = "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 (TC) in this series was found for Co1.5Fe1.5Si, with a TC of 1069 K (24 K higher than the well-known Co2FeSi). 57Fe M{\"o}ssbauer 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 TC.",

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AU - Fischer, Julia Erika

AU - Karel, Julie

AU - Fabbrici, Simone

AU - Adler, Peter

AU - Ouardi, Siham

AU - Fecher, Gerhard H.

AU - Albertini, Franca

AU - Felser, Claudia

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AB - 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 (TC) in this series was found for Co1.5Fe1.5Si, with a TC of 1069 K (24 K higher than the well-known Co2FeSi). 57Fe Mössbauer 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 TC.

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

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Magnetic properties and Curie temperatures of disordered Heusler compounds: Co_1+xFe_2-xSi