Optimizing magneto-optical effects in the ferromagnetic semiconductor GaMnAs
| Autor: | Aristide Lemaître, Bruno Gallas, Laura Thevenard, M.A. Maaref, Catherine Gourdon, H. Riahi |
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| Přispěvatelé: | Laboratoire Matériaux, Molécules et Applications (LMMA), Université de Carthage - University of Carthage-Institut préparatoire aux études scientifiques et techniques [La Marsa] (IPEST), Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Nanostructures et systèmes quantiques (INSP-E1), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Nanostructures et optique (INSP-E4), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Region Ile-de-France (DIMNano-K MURAS2012), réseau RENATECH, ANR-10-BLAN-0424,Mangas,Manipulation de l'aimantation dans le composé ferromagnétique GaMnAs(2010), ANR-13-JS04-0001,SPINSAW,Génération d'ondes de spin par des ondes acoustiques de surface dans des films ferromagnétiques(2013) |
| Rok vydání: | 2015 |
| Předmět: |
010302 applied physics
Materials science Magnetic domain Condensed matter physics Physics::Optics Dielectric Magnetic semiconductor Coercivity Condensed Matter Physics 01 natural sciences Piezoelectricity Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Magnetization Magneto-optic Kerr effect 0103 physical sciences [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Curie temperature 010306 general physics |
| Zdroj: | Journal of Magnetism and Magnetic Materials Journal of Magnetism and Magnetic Materials, 2015, 395, pp.340-344. ⟨10.1016/j.jmmm.2015.07.090⟩ Journal of Magnetism and Magnetic Materials, Elsevier, 2015, 395, pp.340-344. ⟨10.1016/j.jmmm.2015.07.090⟩ |
| ISSN: | 0304-8853 |
| Popis: | International audience; A trilayer of the ferromagnetic semiconductor GaMnAs, a SiO 2 buffer layer and a piezoelectric ZnO layer, is investigated in view of its use in device implementation to study surface acoustic wave-assisted magnetization switching. The magneto-optical properties: Kerr rotation and ellipticity and magnetic contrast in Kerr microscopy images are investigated as a function of temperature. While the ZnO layer prevents any good quality imaging of magnetic domains, we show that with the SiO 2 layer only the polar Kerr rotation and the magnetic contrast are increased by a factor of 2. This result is in good quantitative agreement with calculations using an optical interference model and could be further improved. The detrimental effects of the dielectric layers capping on the Curie temperature and coercive field of the GaMnAs layer can be kept to a reasonable level. |
| Databáze: | OpenAIRE |
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