Abstract
The influence of Q-switched pulsed Nd:YAG laser interference heating parameters on microstructure and magnetic properties of amorphous Fe80Si11B9 alloy was examined. Different laser pulse energy and a variable number of consecutive pulses were used. Results were compared with amorphous and conventionally annealed ribbons. Microstructural analysis, using light, scanning and transmission electron microscopy, was complemented by results of AFM and Mossbauer spectroscopy, as well as measurements of magnetic properties (vibrating sample magnetometer). Periodically distributed crystallized micro-areas, ~10 μm in diameter, in the amorphous matrix were produced by the laser treatment. Laser heating produced nanograin crystalline structure in the amorphous matrix. While after the conventional annealing – dendritic structure was observed. The magnetic hysteresis loop measurement showed that laser heating had no significant influence on soft magnetic properties. Magnetization measurements showed that the as-cast ribbon and laser light irradiated samples are magnetically soft materials. The results lead to the conclusion that the dots corresponding to the laser modified regions exhibit a perpendicular magnetic anisotropy. Magnetic force microscopy showed expanded magnetic structure in laser heated microareas, while the amorphous matrix did not give any magnetic signal.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call