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  Magnetic dichroism study on Mn1.8Co1.2Ga thin film using a combination of x-ray absorption and photoemission spectroscopy

Ouardi, S., Fecher, G. H., Kubota, T., Mizukami, S., Ikenaga, E., Nakamura, T., et al. (2015). Magnetic dichroism study on Mn1.8Co1.2Ga thin film using a combination of x-ray absorption and photoemission spectroscopy. Journal of Physics D: Applied Physics, 48: 164007, pp. 1-11. doi:10.1088/0022-3727/48/16/164007.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-CAE1-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-CAE2-4
Genre: Journal Article

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 Creators:
Ouardi, Siham1, Author              
Fecher, Gerhard H.2, Author              
Kubota, Takahide3, Author
Mizukami, Shigemi3, Author
Ikenaga, Eiji3, Author
Nakamura, Tetsuya3, Author
Felser, Claudia4, Author              
Affiliations:
1Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863439              
2Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
3External Organizations, ou_persistent22              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Using circularly polarised radiation and a combination of bulk-sensitive hard x-ray photoelectron spectroscopy and x-ray-absorption spectroscopy (XAS) we studied the electronic and magnetic structure of epitaxial Mn1.8Co1.2Ga thin films. Spin-resolved Bloch spectral functions, density of states as well as charge and magnetisation densities were investigated by a first-principles analysis of full potential, fully relativistic Korringa-Kohn-Rostoker calculations of the electronic structure. The valence states were experimentally investigated by using linear dichroism in the angular distribution and comparing the results to spin-resolved densities of states. The linear dichroism in the valence band enabled a symmetry analysis of the contributing states. The spectra were in good agreement with the theoretical partial density of states. The element-specific, spin-resolved, unoccupied densities of states for Co and Mn were analysed by using XAS and x-ray magnetic circular dichroism (XMCD) at the L-3,L-2 edges. The spectra were influenced by strong correlation effects. XMCD was used to extract the site-resolved magnetic moments. The experimental values of m(Mn) = 0.7 mu(B) and m(Co) = 1.05 mu(B) agree very well with the calculated magnetic moments. Magnetic circular dichroism in angle-resolved photoelectron spectroscopy at the Mn and Co 2p core level exhibited a pronounced magnetic dichroism and confirmed the localised character of the Mn d valence states.

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Language(s): eng - English
 Dates: 2015-04-08
 Publication Status: Published in print
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Title: Journal of Physics D: Applied Physics
  Abbreviation : J. Phys. D: Appl. Phys.
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 48 Sequence Number: 164007 Start / End Page: 1 - 11 Identifier: ISSN: 0022-3727
CoNE: /journals/resource/0022-3727