Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 91: [MA] Poster II
O 91.11: Poster
Freitag, 30. März 2012, 11:00–14:00, Poster A
Magnetic resonance study of highly spin polarized compounds — •A. Alfonsov1, S. Rodan1, M. E. Belesi1, S. Wurmehl1, V. Kataev1, F. Ferraro2, J. T. Kohlhepp2, H. J. M. Swagten2, B. Koopmans2, K. Takanashi3, B. Subrojati3, Y. Sakuraba3, and B. Büchner1 — 1IFW Dresden, D-01169 Dresden, Germany — 2Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands — 3Institute for Materials Research, Tohoku University, 980-8577 Sendai, Japan
Heusler alloys have attracted a considerable attention in recent years since these compounds can be halfmetallic ferromagnets. Such materials have a theoretical 100% spin polarization at the Fermi level at low temperatures, which gives them a significant potential for spintronics applications. The halfmetallicity strongly depends on the local atomic ordering. Therefore, a precise knowledge of the structural and magnetic ordering also on a local scale is crucial to control the macroscopic physical properties. To obtain this knowledge one has to call for local probe techniques. In this work we present recent nuclear magnetic resonance and electron spin resonance study of various Co-, Mn- and Fe-based Heusler compounds exhibiting different structural disorders and different magnetic ground states.