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

Ouardi S, Fecher GH, Kubota T, Mizukami S, Ikenaga E, Nakamura T, Felser C (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Journal of Physics D: Applied Physics IOP Publishing: Hybrid Open Access

Book Volume: 48

Article Number: 164007

Journal Issue: 16

DOI: 10.1088/0022-3727/48/16/164007

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 L3,2 edges. The spectra were influenced by strong correlation effects. XMCD was used to extract the site-resolved magnetic moments. The experimental values of mMn = 0.7 μB and mCo = 1.05 μB 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.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Tohoku University JP Japan (JP) Japan Synchrotron Radiation Research Institute (JASRI) JP Japan (JP)

How to cite

APA:

Ouardi, S., Fecher, G.H., Kubota, T., Mizukami, S., Ikenaga, E., Nakamura, T., & Felser, C. (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(16). https://doi.org/10.1088/0022-3727/48/16/164007

MLA:

Ouardi, Siham, et al. "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 48.16 (2015).

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