|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Late News Poster Session
||L-52: Application of HRTEM and LTEM for Investigations of Microstructure and Magnetic Domain Structure of Nanocrystalline Fe Based Soft Magnetic Materials after Ultra-rapid Annealing Process
||Wojciech Maziarz, Anna Wójcik, Robert Chulist, Maciej Szlezynger, Maciej Kowalczyk, Aleksandra Kolano-Burian, Paweł Czaja
|On-Site Speaker (Planned)
The work presents application of high resolution transmission electron microscopy (HRTEM) and Lorentz microscopy (LTEM) in the study of crystal structure, microstructure, and magnetic domain structure of nanocrystalline Fe based soft magnetic materials. The Fe78Ni8B14 amorphous melt spun ribbons were subjected to ultra-rapid annealing (URA) process at 500 °C for time duration ranging from 0.5 to 14s. The crystallization of nanocrystalline alfa-Fe solid solution and microstructure evolution with grain sizes from 15 to 35 nm, depending on URA time processing, were observed. The longest URA time (14s) caused the largest grain growth and precipitation of Fe3B phase; the latter being unfavourable for soft magnetic properties. LTEM analysis, including in-situ dynamic observations under an applied magnetic field, allowed for visualization of the magnetic domain and domain walls movement that determine the magnitude of the magnetocrystalline anisotropy.
National Centre for Research and Development (NCBiR) of Poland is acknowledged for funding (TECHMATSTRATEG 2/410941/4/NCBR/2019).
||Characterization, Nanotechnology, Magnetic Materials