Title :
Effect of thermal treatments on the magnetic inhomogeneities distribution in magnetic amorphous wires and microwires
Author :
Chiriac, Horia ; Lupu, Nicoleta
Author_Institution :
Nat. Inst. of R&D for Tech. Phys., Iasi, Romania
Abstract :
Positive magnetostrictive Fe77.5Si7.5B15 conventional amorphous wires (CAW) 125 μm in diameter and amorphous glass-covered microwires (AGCW) with a metallic core diameter of 35 μm have been annealed below and above their crystallization temperature, which produces precipitation of the α-Fe(Si) phase within the amorphous matrix. The J-H loop and the temperature dependence of the magnetization and the coercive field reveal the presence of two different magnetic phases in the thermally treated samples. The effect of the thermal treatment on the magnetic domain structure in both CAW and AGCW and its influence on their soft magnetic properties are discussed.
Keywords :
amorphous magnetic materials; boron alloys; coercive force; crystallisation; ferromagnetic materials; heat treatment; iron alloys; magnetic domains; magnetic hysteresis; magnetostriction; metallic glasses; precipitation; silicon alloys; soft magnetic materials; α-Fe(Si) phase precipitation; 125 micron; 35 micron; Fe77.5Si7.5B15; J-H loop; amorphous glass-covered microwires; coercive field; crystallization temperature; magnetic amorphous wires; magnetic domain structure; magnetic inhomogeneities distribution; magnetization; metallic core diameter; positive magnetostrictive Fe77.5Si7.5B15 amorphous wires; soft magnetic properties; temperature dependence; thermal treatments; Amorphous magnetic materials; Amorphous materials; Annealing; Crystallization; Iron; Magnetic cores; Magnetic domains; Magnetostriction; Soft magnetic materials; Wires;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.815884
