Strain driven monoclinic distortion of ultrathin CoO films in the exchange-coupled CoO/FePt/Pt(0 0 1) system
| Autor: | Márcio M. Soares, Stéphane Grenier, Hélio C. N. Tolentino, Aline Y. Ramos, Maurizio De Santis, A. D. Lamirand |
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| 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) |
| Rok vydání: | 2015 |
| Předmět: |
Diffraction
Materials science 02 engineering and technology Substrate (electronics) 021001 nanoscience & nanotechnology Condensed Matter Physics Epitaxy 01 natural sciences Tetragonal crystal system Crystallography Ferromagnetism Phase (matter) Distortion 0103 physical sciences [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] General Materials Science 010306 general physics 0210 nano-technology Monoclinic crystal system |
| Zdroj: | Journal of Physics: Condensed Matter Journal of Physics: Condensed Matter, IOP Publishing, 2015, 27 (8), pp.085001. ⟨10.1088/0953-8984/27/8/085001⟩ |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/0953-8984/27/8/085001 |
| Popis: | The structure and strain of ultrathin CoO films grown on a Pt(0 0 1) substrate and on a ferromagnetic FePt pseudomorphic layer on Pt(0 0 1) have been determined with in situ and real time surface x-ray diffraction. The films grow epitaxially on both surfaces with an in-plane hexagonal pattern that yields a pseudo-cubic CoO(1 1 1) surface. A refined x-ray diffraction analysis reveals a slight monoclinic distortion at RT induced by the anisotropic stress at the interface. The tetragonal contribution to the distortion results in a ratio 1$ SRC=http://ej.iop.org/images/0953-8984/27/8/085001/cm507363ieqn001.gif/>, opposite to that found in the low temperature bulk CoO phase. This distortion leads to a stable Co2+ spin configuration within the plane of the film. |
| Databáze: | OpenAIRE |
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