hide
Free keywords:
-
Abstract:
Quaternary Heusler alloys Co2Cr1-xFexAl with varying Cr to Fe ratio x
were investigated experimentally and theoretically. The electronic
structure and spectroscopic properties were calculated using the full
relativistic Korringa-Kohn-Rostocker method with coherent potential
approximation to account for the random distribution of Cr and Fe atoms
as well as random disorder. Magnetic effects are included using spin
dependent potentials in the local spin density approximation.
Magnetic circular dichroism in x-ray absorption was measured at the
L-2,L-3 edges of Co, Fe and Cr of the pure compounds and the x = 0.4
alloy in order to determine element specific magnetic moments.
Calculations and measurements show an increase of the magnetic moments
with increasing, iron content. Resonant (560-800eV) soft x-ray as well
as high resolution-high energy (>= 3.5 keV) hard x-ray photo emission
was used to probe the density of the Occupied states in Co2Cr0.6Fe0.4Al.
