Physics of the Solid State
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- 2024
- 2023
- 2022
Patterns of the fractal dimension evolution of magneto-optical images of magnets after exposure to a pulsed field
Zigert A. D.
1, Kuz`min N. B.1, Semenova E. M.
1, Ivanova A. I.
1, Tretyakov S. A.
1, Sdobnyakov N. Yu.
1
1Tver State University, Tver, Russia
Email: alex-zigert@yandex.ru, kuzminnickolay201440yandex.ru, semenova_e_m@mail.ru, ivanova.ai@tversu.ru, tasleo@inbox.ru, nsdobnyakov@mail.ru
The results of fractal analysis of images of the surface of a permanent magnet NdFeB (N35 brand) obtained by the polar Kerr effect method using an indicator bismuth-containing ferrite-garnet film after magnetization reversal by a pulsed field of 0.1-2 T are presented. Two different methods of changing the magnetic field are used: sequential change in the magnitude of the magnetic pulse and magnetization to saturation before each acting pulse. A correlation between the form of the field dependences of the fractal dimension of the profile of magneto-optical images of the magnet surface DL(H) and the corresponding dependences Mr(H) is established. The obtained data are compared with the results of a similar fractal analysis of the KC37 (SmCo) magnet. Keywords: fractal dimension, remanence, field dependences, Kerr effect, ferrite-garnet film.
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