Report/Journal Article

PUBDB-2015-01977

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png State of Co and Mn in half-Metallic Ferromagnet $\mathrm{Co_ 2MnSi}$ explored by Magnetic Circular Dichroism in hard X-ray Photoelectron Emission and Soft X-Ray Absorption Spectroscopie

FECHER, G. H. (Corresponding Author)>Extern* ; EBKE, D. ; OUARDI, S.>Extern* ; AGRESTINI, S. ; KUO, C.-Y.>Extern* ; HOLLMANN, N. ; HU, Z.>Extern* ; GLOSKOVSKII, A.DESY* ; YAKHOU, F. ; BROOKES, N. B. ; FELSER, C.>Extern*

2014
World Scientific Publishing Singapore [u.a.]

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Please use a persistent id in citations: doi:10.1142/S2010324714400177

Report No.: arXiv:1501.03966

Abstract: The half-metallic Heusler compound Co2MnSi is a very attractive material for spintronic devices because it exhibits very high tunnelling magnetoresistance ratios. This work reports on a spectroscopic investigation of thin Co2MnSi films as they are used as electrodes in magnetic tunnel junctions. The investigated ̄lms exhibit a remanent in-plane magnetization with a magnetic moment of about 5 uB when saturated, as expected. The low coercive field of only 4 mT indicates soft magnetic behavior. Magnetic dichroism in emission and absorption was measured at the Co and Mn 2p core levels. The photoelectron spectra were excited by circularly polarized hard X-rays with an energy of 6 keV and taken from the remanently magnetized film. The soft X-ray absorption spectra were taken in an induction ̄eld of 4 T. Both methods yielded large dichroism effects. An analysis reveals the localized character of the electrons and magnetic moments attributed to the Mn atoms, whereas the electrons related to the Co atoms contribute an itinerant part to the total magnetic moment.

Note: OA

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Contributing Institute(s):

1. PETRA III Extension (FS-PEX)

Research Program(s):

1. PETRA Beamline P09 (POF2-54G14) (POF2-54G14)
2. IDEA HEUSLER! - Inverse Design on an Atomic scale: Multifunctional Heusler compounds! (291472) (291472)

Experiment(s):

1. PETRA Beamline P09 (PETRA III)

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