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Schlagwörter:
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Zusammenfassung:
Ferrimagnetic Mn3-xCoxGa compounds have been investigated by magnetic
circular dichroism in x-ray absorption (XMCD). Compounds with x>0.5
crystallize in the CuHg2Ti structure. A tetragonal distortion of the
cubic structure occurs for x <= 0.5. For the cubic phase, magnetometry
reveals a linearly increasing magnetization of 2x Bohr magnetons per
formula unit obeying the generalized Slater-Pauling rule. XMCD confirms
the ferrimagnetic character with Mn atoms occupying two different
sublattices with antiparallel spin orientation and different degrees of
spin localization and identifies the region 0.6<x <= 0.8 as most
promising for a high spin polarization at the Fermi level. Individual Mn
moments on inequivalent sites are compared to theoretical predictions.
(C) 2011 American Institute of Physics. [doi: 10.1063/1.3592802]