Tuesday 31 October 2006 at 15:00
Martin Amft
(Theoretical Magnetism, Department of Physics
Uppsala University, Sweden)
Calculated Magneto-Optical Kerr Spectra of
the uranium compounds UX2Si2 (X = Ni, Ru)
and the (half-) Heusler alloys AuMnX
(X = In, Sn, Sb) and Co2FeSi
Abstract:
Recently the Magneto-Optical Kerr Effect was measured for
the Heusler alloy AuMnSn and for the uranium compound
UNi2Si2. By means of a relativistic Augmented
Spherical Wave (ASW) scheme the electronic structures of
these, and related, materials were calculated. These
information in turn were used to calculated
the optical-conductivity tensor elements σxx
and σxy, which determine e.g. the Kerr angle
θK and ellipticity εK.
Furthermore the calculated results for the Heusler
alloy Co2FeSi will be shown, since in a recent
publication measurements were presented in which
an extra ordinary high magnetic moment of
6 μB/f.u. was obtained.
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