Robust perpendicular exchange coupling in an ultrathin CoO/PtFe double layer: Strain and spin orientation
| Autor: | Abner de Siervo, A. D. Lamirand, Julio C. Cezar, Matthieu Jamet, Aline Y. Ramos, Márcio M. Soares, Hélio C. N. Tolentino, Maurizio De Santis |
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| Přispěvatelé: | Surfaces, Interfaces et Nanostructures (NEEL - SIN), Institut Néel (NEEL), 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)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Matériaux, Rayonnements, Structure (NEEL - MRS), CRG & Grands instruments (NEEL - CRG), Laboratório Nacional de Luz Sìncrotron (LNLS), Centro Nacional de Pesquisa em Energia e Materiais = Brazilian Center for Research in Energy and Materials (CNPEM), Instituto de Fisica Gleb Wataghin (IFGW), Universidade Estadual de Campinas = University of Campinas (UNICAMP), Institut Nanosciences et Cryogénie (INAC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Surfaces, Interfaces et Nanostructures (SIN), 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), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Universidade Estadual de Campinas (UNICAMP) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Absorption spectroscopy Magnetism FOS: Physical sciences 02 engineering and technology 01 natural sciences Condensed Matter::Materials Science 0103 physical sciences Antiferromagnetism x ray absorption spectroscopy Thin film 010306 general physics Double layer (biology) X-ray absorption spectroscopy Condensed Matter - Materials Science Condensed matter physics PACS 75.70.-i 75.50.Ee 75.25.+z 78.70 Dm Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Condensed Matter Physics Electronic Optical and Magnetic Materials spin arrangements Exchange bias thin films magnetism [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Monoclinic crystal system |
| Zdroj: | Physical Review B: Condensed Matter and Materials Physics (1998-2015) Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 88 (14), pp.140401(R). ⟨10.1103/PhysRevB.88.140401⟩ Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2013, 88 (14), pp.140401(R). ⟨10.1103/PhysRevB.88.140401⟩ |
| ISSN: | 1098-0121 1550-235X |
| DOI: | 10.1103/PhysRevB.88.140401⟩ |
| Popis: | 5 pages; International audience; We report on the exchange coupling and magnetic properties of a strained ultrathin CoO/PtFe double layer with perpendicular magnetic anisotropy. The cobalt oxide growth by reactive molecular beam epitaxy on a Pt-terminated PtFe/Pt(001) surface gives rise to a hexagonal surface and a monoclinic distorted CoO 3 nm film at room temperature. This distorted ultrathin CoO layer couples with the PtFe(001) layer establishing a robust perpendicular exchange bias shift. Soft x-ray absorption spectroscopy provides a full description of the spin orientations in the CoO/PtFe double layer. The exchange bias shift is preserved up to the N'eel antiferromagnetic ordering temperature of TN = 293 K. This unique example of selfsame value for blocking and ordering temperatures, yet identical to the bulk ordering temperature, is likely related to the original strain-induced distortion and strengthened interaction between the two well-ordered spin layers. |
| Databáze: | OpenAIRE |
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