Spin-dependent electron momentum densities in Cu2MnAl studied by Compton scattering
UNSPECIFIED. (1997) Spin-dependent electron momentum densities in Cu2MnAl studied by Compton scattering. JOURNAL OF PHYSICS-CONDENSED MATTER, 9 (49). pp. 10993-11005. ISSN 0953-8984Full text not available from this repository.
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 mu(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 mu(B), which is in agreement with neutron data. The spin-dependent Compton profiles for the ,  and  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.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Journal or Publication Title:||JOURNAL OF PHYSICS-CONDENSED MATTER|
|Publisher:||IOP PUBLISHING LTD|
|Official Date:||8 December 1997|
|Number of Pages:||13|
|Page Range:||pp. 10993-11005|
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