Field dependence of orbital magnetic moments in the Heusler compounds Co2FeAl and Co2Cr0.6Fe0.4Al
Field dependence of orbital magnetic moments in the Heusler compounds Co2FeAl and Co2Cr0.6Fe0.4Al
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DOI：
10.1007/s00339-003-2366-3
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发表时间：
2004-08
期刊：
影响因子：
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通讯作者：
H. Elmers;S. Wurmehl;G. Fecher;G. Jakob;C. Felser;G. Schönhense
中科院分区：
文献类型：
--
作者：
H. Elmers;S. Wurmehl;G. Fecher;G. Jakob;C. Felser;G. Schönhense
Orbital and spin magnetic moments of the Heusler compounds Co{sub 2}FeAl and Co{sub 2}Cr{sub 0.6}Fe{sub 0.4}Al 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 r(Fe)=0.04{+-}0.02 and {delta}r(Co)=0.06{+-}0.02 with increasing external field for the ternary compound Co{sub 2}FeAl, while the ratio is within error limits independent of the field for Co{sub 2}Cr{sub 0.6}Fe{sub 0.4}Al. This is discussed in terms of a relation to magnetocrystalline anisotropies.
