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Title: Spin-dependent electron momentum densities in Cu2MnAl studied by Compton scattering
Authors: Zukowski, E.
Andrejczuk, A.
Dobrzynski, L.
Cooper, M.J.
Dixon, M.A.G.
Gardelis, S.
Lawson, P.K.
Buslaps, T.
Kaprzyk, S.
Neumann, K-U.
Ziebeck, K.R.A.
Issue Date: 1997
Publisher: © Institute of Physics
Citation: ZUKOWSKI et al, 1997. Spin-dependent electron momentum densities in Cu2MnAl studied by Compton scattering. Journal of Physics: Condensed Matter, 9(49), pp. 10993–11005
Abstract: The 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.
Description: 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.
URI: https://dspace.lboro.ac.uk/2134/1693
ISSN: 0953-8984
Appears in Collections:Closed Access (Physics)

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