Apertureless scanning near-field magneto-optical microscopy of magnetic multilayers |
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| Authors: | L Aigouy S Grésillon A Lahrech A C Boccara J C Rivoal V Mathet C Chappert J P Jamet & J Ferré |
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| Affiliation: | Laboratoire d'Optique Physique de l'E.S.P.C.I., rue Vauquelin, 75231 Paris Cedex 05, France,;UniversitéPierre et Marie Curie, 75231 Paris, France,;Institut d'Electronique Fondamentale, Batiment 220, UniversitéParis-Sud, 91405 Orsay, France,;Laboratoire de Physique des Solides, Batiment 510, UniversitéParis-Sud, 91405 Orsay, France |
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| Abstract: | We imaged magnetic domains in Pt/Co/Pt multilayers using an apertureless scanning near-field optical microscope operating in reflection mode. As the magneto-optical effects are weak for this kind of structure, a polarization modulation technique with a photoelastic modulator was used to reveal the contrast between magnetic domains. In the case of a Pt/Co/Pt trilayer structure, a strong improvement in lateral resolution is observed compared with far-field magneto-optical images and good sensitivity is achieved. In the case of a Pt/Co/Pt]Pt multilayer structure, stripe domains of 200 nm width could be resolved, in good agreement with images obtained by magnetic force microscopy on the same structure. |
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| Keywords: | Co/Pt multilayers magnetic domains magneto-optics near-field optics perpendicular anisotropy polarization scattering |
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