Abstract
We have employed combinatorial approach to explore molecular beam epitaxy synthesis and characterization of multicomponent magnetic alloys. Structural evolution was studied in situ using scanning reflection high-energy electron diffraction and magnetic properties were probed using magneto-optic imaging and SQUID magnetometry. Results from a ternary system of CoMnGe are presented. These alloys exhibit a rich variety of magnetic and magneto-optic behavior, including a robust phase near Co 0.4Mn 0.4Ge 0.2 with high-spin polarization, high T c and high magneto-optic response. The observed magnetic responses show strong correlation with structural transformations such that structural ordering and symmetry change can give rise to enhanced magnetic and magneto-optic interactions. The observed magnetism in these alloys and their compatibility with Ge substrates make them potential candidates for spin electronic transport studies and applications.
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