Field dependence of orbital magnetic moments in the Heusler compounds Co2FeAl 
and Co2Cr0.6Fe0.4Al

Elmers, H.J.; Wurmehl, S.; Fecher, G.H.; Jakob, G.; Felser, C.; Schönhense, G.

doi:10.1007/s00339-003-2366-3

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Field dependence of orbital magnetic moments in the Heusler compounds Co₂FeAl and Co₂Cr_0.6Fe_0.4Al

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Elmers, H., Wurmehl, S., Fecher, G., Jakob, G., Felser, C., & Schönhense, G. (2004). Field dependence of orbital magnetic moments in the Heusler compounds Co₂FeAl and Co₂Cr_0.6Fe_0.4Al. Applied Physics A, 79(3), 557-563. doi:10.1007/s00339-003-2366-3.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-6184-B

Abstract

Orbital and spin magnetic moments of the Heusler compounds Co2FeAl and Co2Cr0.6Fe0.4Al were measured by magnetic circular dichroism in X-ray absorption (XMCD). The orbital magnetic moments per spin are quite large (0.1-0.2) compared to bulk values of Fe and Co metals, indicating a considerable spin-orbit coupling in these Heusler compounds. A strong localization of the 3d electron states might be responsible for this observation. The Co and Fe orbital to spin moment ratio shows a distinct decrease of Deltar(Fe) = 0.04 +/- 0.02 and Deltar(Co) = 0.06 +/- 0.02 with increasing external field for the ternary compound Co2FeAl, while the ratio is within error limits independent of the field for Co2Cr0.6Fe0.4Al. This is discussed in terms of a relation to magnetocrystalline anisotropies.