Vectorization of magneto-optical images of a in plane component of inhomogeneous magnetic fields

• Published in: Journal of magnetism and magnetic materials Vol. 570; p. 170493
• Main Authors: Ivanov, V.E., Gorkovenko, A.N., Lepalovskij, V.N.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-03-2023
• Subjects: Algorithm; Inhomogeneous field; Kerr effect; Vectorizing; Kerr effect; Inhomogeneous field; Algorithm; Vectorizing
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2023.170493

•Vectoring of magneto-optical images of inhomogeneous field was performed.•Images in longitudinal and transverse sensitivity was used.•Both images were obtained in different magnetization reversal cycles.•The algorithm for converting images into a vector graph is compiled.•Vector graphs adequately display a inhomogeneous field.
A method based on the magneto-optical Kerr effect is demonstrated, which makes it possible to quantitatively determine spatial dependences of the directions of an in-plane component of inhomogeneous magnetic field visualized by soft nanocrystalline films. The method consists in obtaining magneto-optical images of micromagnetic structures that are formed under the influence of an inhomogeneous field. Images in the longitudinal and transverse sensitivity of the Kerr effect are used to calculate the angular dependence of the directions of the unit vectors of this field under the assumption that the components of the field are proportional to the brightness of magneto-optical images. The field direction maps obtained in this way agree with model calculations for our magnets.