Visualisation of magnetic domain structures through the interaction of their stray fields with magneto-optic garnet films

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Abstract

A technique is described for the indirect visualisation of magnetic domain structures through the coupling of stray surface magnetic fields into a bismuth-substituted garnet layer. The resulting magnetisation distribution within the garnet layer is visualised optically using the polar Kerr effect. A small single-crystal platelet of barium hexaferrite is used to demonstrate the method and the complex, field-induced magnetisation patterns in the garnet are discussed qualitatively. The effect of a small bias field on the magnetisation structures is also considered and has been shown to be a means of simplifying the complex images which are produced. This indirect magneto-optical method of visualising magnetic domains is both effective and convenient, although the ultimate limits of resolution for the technique remain to be determined. © 1995.

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Atkinson, R., Kubrakov, N. F., O’Neill, M., & Papakonstantinou, P. (1995). Visualisation of magnetic domain structures through the interaction of their stray fields with magneto-optic garnet films. Journal of Magnetism and Magnetic Materials, 149(3), 418–424. https://doi.org/10.1016/0304-8853(95)00273-1

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