Evolution of Microstructure and Magnetic Domains in Fe74B20Nb2Hf2Si2 Soft Magnetic Alloy Studied by In-Situ Ultra-Rapid Heating TEM and Lorentz TEM Microscopy |
| P. Czajaa, M. Nabiałekb
aThe Aleksander Krupkowski Institute of Metallurgy and Materials Science of the Polish Academy of Sciences, 25 Reymonta St., 30-059 Kraków, Poland bDepartment of Physics, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland |
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| The Fe74B20Nb2Hf2Si2 alloys have been subjected to in-situ transmission electron microscopy ultra-rapid annealing at 900°. The alloys' microstructure develops into a fine nanocomposite microstructure with a large number of pinning sites, causing the average size reduction of magnetic domains. It is demonstrated that the applied in-situ heating procedure is suited for analysis of the subtle microstructural changes in soft magnetic materials and thus can aid in the optimization of various modes of heat treatment applied for the development of applicable microstructures. |
DOI:10.12693/APhysPolA.142.17 topics: soft magnetic materials, magnetic domains, transmission electron microscopy (TEM) |