The influence of near IR laser annealing on the magnetic properties of Fe-Si sheet

A pulsed Nd:YAG laser (1.064 µm, 3 ms, 1.2 J) was used to modified the magnetic properties of Fe-Si (6.5 wt% Si) sheet targets by laser annealing. The measurements of hysteresis properties were performed with a mini-single strip tester. The experimental results which include the decreasing of relative magnetic permeability and magnetic remanence and the increasing of coercive force after laser irradiation of the target are reported. A discussion about the obtained experimental results in the term of Weiss magnetic domain is given. (Received November 14, 2010; accepted November 29, 2010)