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キーワード:
MAGNETIC CIRCULAR-DICHROISM, SUM-RULE, ABSORPTION, METALSChemistry;
要旨:
X-ray absorption spectroscopy (XAS) and X-ray magnetic circular
dichroism (XMCD) were used to probe the electronic structure and
magnetic moment of Mn in Heusler compounds with different
crystallographic structure. The results were compared with theoretical
calculations of the magnetic and electronic properties, and it was found
that in full and half Heusler alloys, Mn is metallic on both
sublattices. The magnetic moment is large and localized when
octahedrally coordinated by the main group element, consistent with
previous theoretical work, and reduced when the main group coordination
is tetrahedral. The magnetic and electronic properties of Mn in full and
half Heusler compounds are strongly dependent on the structure and
sublattice, a fact that can be exploited to design new materials.
