Physics – Condensed Matter – Materials Science
Scientific paper
2011-07-05
Physical Review B 84, 132405 (2011)
Physics
Condensed Matter
Materials Science
5 pages, 4 figures
Scientific paper
10.1103/PhysRevB.84.132405
Epitaxial thin films of the half-metallic Xa-compound Mn2CoGa (Hg2CuTi prototype) were prepared by dc magnetron co-sputtering with different heat treatments on MgO (001) substrates. High-quality films with a bulk magnetization of 1.95(5)\mu_B per unit cell were obtained. The L3,2 x-ray magnetic circular dichroism spectra agree with calculations based on density functional theory (DFT) and reveal the antiparallel alignment of the two inequivalent Mn moments. X-ray magnetic linear dichroism, in good agreement with theory as well, allows to distinguish between itinerant and local Mn moments. Based on non-collinear spin DFT it is shown that one of the two Mn moments has local character, whereas the other Mn moment and the Co moment are itinerant.
Arenholz Elke
Böhnert Tim
Klewe Christoph
Meinert Markus
Nielsch Kornelius
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