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  STATE OF Co AND Mn IN HALF-METALLIC FERROMAGNET Co2MnSi EXPLORED BY MAGNETIC CIRCULAR DICHROISM IN HARD X-RAY PHOTOELECTRON EMISSION AND SOFT X-RAY ABSORPTION SPECTROSCOPIES

Fecher, G. H., Ebke, D., Ouardi, S., Agrestini, S., Kuo, C.-Y., Hollmann, N., et al. (2014). STATE OF Co AND Mn IN HALF-METALLIC FERROMAGNET Co2MnSi EXPLORED BY MAGNETIC CIRCULAR DICHROISM IN HARD X-RAY PHOTOELECTRON EMISSION AND SOFT X-RAY ABSORPTION SPECTROSCOPIES. SPIN, 4(4): 1440017, pp. 1-16. doi:10.1142/S2010324714400177.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-9D12-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-71C2-8
Genre: Journal Article

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 Creators:
Fecher, Gerhard H.1, Author              
Ebke, Daniel2, Author              
Ouardi, Siham3, Author              
Agrestini, Stefano4, Author              
Kuo, Chang-Yang5, Author              
Hollmann, Nils6, Author              
Hu, Zhiwei7, Author              
Gloskovskii, Andrei8, Author
Yakhou, Flora8, Author
Brookes, Nicholas B., Author
Felser, Claudia9, Author              
Affiliations:
1Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
2Daniel Ebke, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863430              
3Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863439              
4Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863459              
5Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
6Nils Hollmann, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863456              
7Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
8External Organizations, ou_persistent22              
9Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 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 films exhibit a remanent in-plane magnetization with a magnetic moment of about 5 μB 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 field 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.

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Language(s): eng - English
 Dates: 2014-12-31
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1142/S2010324714400177
BibTex Citekey: doi:10.1142/S2010324714400177
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Title: SPIN
Source Genre: Journal
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Publ. Info: London : World Scientific
Pages: - Volume / Issue: 4 (4) Sequence Number: 1440017 Start / End Page: 1 - 16 Identifier: CoNE: /journals/resource/SPIN