hide
Free keywords:
-
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.