2015/01/16 by Siham Ouardi, Gerhard H. Fecher, Takahide Kubota +4 · 14 citations
Chemistry · Materials Science · Physics and Astronomy · #Absorption spectroscopy #Atomic physics #Chemistry #Circular dichroism #Condensed matter physics #Crystallography #Density of states #Electronic structure #Heusler alloys: electronic and magnetic properties #Linear dichroism #Magnetic and transport properties of perovskites and related materials #Magnetic circular dichroism #Magnetic field #Magnetic moment #Magnetic properties of thin films #Magnetization #Materials science #Nuclear magnetic resonance #Optics #Physics #Spectral line #Spectroscopy #Valence (chemistry) #X-ray absorption spectroscopy #X-ray magnetic circular dichroism #X-ray photoelectron spectroscopy #cond-mat.mtrl-sci
paper · pdf · doi:10.1088/0022-3727/48/16/164007
published in Journal of Physics D Applied Physics 48(16), 164007 (Institute of Physics)
arxiv created 2015/01/16 · openalex publication_date 2015/04/08 · arxiv updated 2015/04/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 Mn 1.8 Co 1.2 Ga 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 3,2 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 μ B and m Co = 1.05 μ B agree very well with the calculated magnetic moments. Magnetic circular dichroism in angle-resolved photoelectron spectroscopy at the Mn and Co 2 p core level exhibited a pronounced magnetic dichroism and confirmed the localised character of the Mn d valence states.