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Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 45: Spin-dependent Transport Phenomena II

MA 45.3: Vortrag

Donnerstag, 19. März 2015, 15:30–15:45, H 0112

Compton profiles of random Fe0.5Ni0.5 alloy, evidence for the interplay of disorder and correlation in momentum space — •Liviu Chioncel1,2, Diana Benea3,4, Hubert Ebert4, and Jan Minar4,51Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D - 86135 Augsburg, Germany — 2Augsburg Center for Innovative Technologies, University of Augsburg, D-86135 Augsburg, Germany — 3Faculty of Physics, Babes-Bolyai University, Kogalniceanustr 1, Ro-400084 Cluj-Napoca, Romania — 4Chemistry Department, University Munich, Butenandstr. 5-13, D-81377 München, Germany — 5New Technologies - Research Center, University of West Bohemia, Univerzitni 8, 306 14 Pilsen, Czech Republic

We study the magnetic Compton profile of the disordered Fe50Ni50 alloy and discuss the interplay between structural disorder and electronic correlations. The disorder distribution is described within the Coherent Potential Approximation while local electronic correlations are captured with the Dynamical Mean Field Theory. The disorder induced changes in the experimental magnetic Compton profiles are well described by the theoretical calculations only when both components Fe and Ni are subject to considerable electronic correlations.

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