Analysis of Magneto-Optical Hysteresis Loops of Amorphous and Surface-Crystalline Fe-Based Ribbons

0536869 - ÚFM 2022 RIV CH eng J - Článek v odborném periodiku
Žitovský, O. - Markov, D. - Hrabovská, K. - Buršík, Jiří - Jirásková, Yvonna
Analysis of Magneto-Optical Hysteresis Loops of Amorphous and Surface-Crystalline Fe-Based Ribbons.
Materials. Roč. 14, č. 1 (2021), č. článku 141. E-ISSN 1996-1944
Institucionální podpora: RVO:68081723
Klíčová slova: planar flow casting * ribbons * surface magnetism * magneto-optical Kerr microscopy * magnetic force microscopy * magnetic domains * hysteresis loops
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.748, rok: 2021
Způsob publikování: Open access
https://www.mdpi.com/1996-1944/14/1/141

Three Fe-based ribbon-type samples prepared by a conventional planar flow casting process are studied from the viewpoint of the amorphous Fe80Si4B16 and partially surface crystallized Fe80Si10B10, and Fe80.5Nb6.9B12.6, microstructures. Surface magnetic properties are investigated by magneto-optical Kerr microscopy, allowing the measurement of a local hysteresis loop from a selected area on the ribbon surface, and simultaneously, a domain structure corresponding to a definite point at the loop. For an amorphous sample, the changes in the slopes of hysteresis loops are related either to the size of the selected surface area, from which the loop is measured, or to the type, width, and movement of magnetic domains through this area. In the first case, the resizing of the area simulates an effect of changing the diameter of the incident laser beam on the magneto-optical properties of the ribbon. In the latter case, the observed wide-curved and fingerprint domains are responsible for markedly different shapes of the hysteresis loops at lower magnetic fields. If the surface is crystallized, the magnetic properties are more homogenous, showing typical one-jump magnetization reversal with less dependence on the size of the surface area. The magneto-optical experiments are completed by transmission electron microscopy and magnetic force microscopy.
Trvalý link: http://hdl.handle.net/11104/0319608