Spin orientation in an ultrathin CoO/PtFe double-layer with perpendicular exchange coupling

Autor: Abner de Siervo, Hélio C. N. Tolentino, Márcio M. Soares, A. D. Lamirand, Maurizio De Santis, Julio C. Cezar, Aline Y. Ramos
Přispěvatelé: Surfaces, Interfaces et Nanostructures (SIN), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Matériaux, Rayonnements, Structure (MRS), CRG et Grands Instruments (CRG), Laboratório Nacional de Luz Sìncrotron (LNLS), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Instituto de Fisica Gleb Wataghin (IFGW), Universidade Estadual de Campinas (UNICAMP)
Rok vydání: 2015
Předmět:
Zdroj: Journal of Magnetism and Magnetic Materials
Journal of Magnetism and Magnetic Materials, Elsevier, 2015, 373, pp.6-9. ⟨10.1016/j.jmmm.2014.02.039⟩
ISSN: 0304-8853
Popis: We studied by soft X-ray absorption spectroscopy the magnetization axis in a 4 nm thin CoO (111) layer exchange-coupled to an ultra thin L 1 0 PtFe layer with perpendicular magnetic anisotropy. The angular dependence of the linear magnetic dichroism at 10 K and the relative variations of the spectral features provide a full description of the spin orientation in this antiferromagnetic layer. The spins are found in the film plane, pointing along the 110 direction. This results is discussed in relation to the film strain and the preferential occupation of t 2 g orbitals. The strong orthogonal coupling between Co and Fe spins should be at the origin of the robustness of the exchange bias effect found in this bilayer system.
Databáze: OpenAIRE
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