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Spin-dependent electron momentum densities in Cu2MnAl studied by Compton scattering
journal contribution
posted on 2006-05-11, 11:46 authored by E. Zukowski, A. Andrejczuk, L. Dobrzynski, M.J. Cooper, M.A.G. Dixon, S. Gardelis, P.K. Lawson, T. Buslaps, S. Kaprzyk, Klaus-Ulrich Neumann, K.R.A. ZiebeckThe spin density in the Heusler alloy Cu2MnAl, has been studied in a Compton
scattering experiment with 92 keV circularly polarized synchrotron radiation on the high-energy
beamline at ESRF. The conduction electrons were found to have a negative spin polarization of
0:4 B which is at variance with the deduction of a positive moment from earlier neutron data;
neither was any evidence found for a 3d spin moment on the copper site. The spin moment on
the Mn site at room temperature was determined as 3:25 B, which is in agreement with neutron
data. The spin-dependent Compton profiles for the [100], [110] and [111] directions, reported
here, show anisotropy in the momentum density which is in good agreement with new KKR
calculations based on a ferromagnetic ground state. By combining charge- and spin-dependent
Compton data the momentum space anisotropies in the majority and minority bands have been
analysed. Both the majority and minority spin densities are anisotropic.
History
School
- Science
Department
- Physics
Pages
210024 bytesCitation
ZUKOWSKI et al, 1997. Spin-dependent electron momentum densities in Cu2MnAl studied by Compton scattering. Journal of Physics: Condensed Matter, 9(49), pp. 10993–11005Publisher
© Institute of PhysicsPublication date
1997Notes
This article has been published in the journal, Journal of Physics: Condensed Matter [© Institute of Physics]. It is also available at: http://www.iop.org/EJ/journal/JPhysCM.ISSN
0953-8984Language
- en