First-principles modeling of the magneto-optical response in inhomogeneous systems (Articolo in rivista)

Type
Label
  • First-principles modeling of the magneto-optical response in inhomogeneous systems (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Ricci, F; D'Orazio, F; Continenza, A; Lucari, F; Freeman, AJ (2008)
    First-principles modeling of the magneto-optical response in inhomogeneous systems
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ricci, F; D'Orazio, F; Continenza, A; Lucari, F; Freeman, AJ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 78 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Ricci, Fabio; D'Orazio, Franco; Continenza, Alessandra; Lucari, Franco] Univ Aquila, Dipartimento Fis, CNISM, I-67100 Laquila, Italy; [Lucari, Franco] Univ Aquila, Dipartimento Fis, INFM, CNR, I-67100 Laquila, Italy; [Freeman, Arthur J.] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA (literal)
Titolo
  • First-principles modeling of the magneto-optical response in inhomogeneous systems (literal)
Abstract
  • We develop an ab initio computational approach to calculate the magneto-optical Kerr effect spectra of layered and nanogranular compounds as a function of several structural and geometrical parameters: (i) composition, (ii) film thickness, and (iii) position, thickness, and number of the nonmagnetic interlayers. The case of nanoparticles in a matrix is treated within the effective-medium approximation and compared to a model (alternating composition layers approximation) that considers different compounds in a thin-film multilayered structure. The magneto-optical filter-amplifier effect of a nonmagnetic overlayer or interlayer and the dependence of the Kerr response on the specific sample composition suggest that our computational approach is a good starting point to build up structures with the desired magneto-optical characteristics and can be used to interpret experimental spectra to single out the microscopic structure and composition of the sample. The model is applied to the Mn-Ge binary system, considering both Mn5Ge3 as a film or in a nanoparticle arrangement and MnxGe1-x diluted semiconductor as possible phases in pure form or intermixed with Ge. (literal)
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