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The magneto-optical gradient effect in anexchange-biased thin film: experimental evidencefor classical diffraction theory
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SYSNO ASEP 0343292 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The magneto-optical gradient effect in anexchange-biased thin film: experimental evidencefor classical diffraction theory Author(s) Schäfer, R. (DE)
Hamann, C. (DE)
McCord, J. (DE)
Schultz, L. (DE)
Kamberský, Vladimír (FZU-D)Source Title New Journal of Physics. - : Institute of Physics Publishing - ISSN 1367-2630
Roč. 12, č. 5 (2010), 053006/1-053006/10Number of pages 10 s. Language eng - English Country DE - Germany Keywords magnetooptics ; magnetic domains ; light diffraction Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000277355500006 DOI 10.1088/1367-2630/12/5/053006 Annotation The magneto-optical gradient effect decorates the boundaries of inplane domains even at perpendicular incidence of light in an optical polarization microscope. For its explanation, magneto-optical diffraction theory was previously used to derive it from the same gyrotropic interaction as the Kerr effect. In order to explain the symmetry of the observed contrast on bulk ferromagnetic crystals, planar as well as perpendicular subsurface gradients in the magnetization had to be assumed. This was particularly needed when the surface magnetizations in neighboring domains pointed headon and a gradient contrast appeared also in conditions of vanishing gyrotropic interaction at the surface. Such contrast should not appear in very thin films where perpendicular magnetization gradients are not enforced by reduction of dipolar energy. Here we present the first experimental confirmation of this expectation. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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