engleski

Verification of the model for the magnetization of current carrying amorphous ribbons

Detailed investigation of the dM/dt versus H curves and the corresponding M-H loops for as- received magnetostrictive Fe80B20 alloy and nonmagnetostrictive Co70, 3Fe4, 7Si15B10 alloy carrying direct currents Jd≤160 mA has been performed. For both alloys (representing two major classes of amorphous ferromagnetic alloys9 the model for the influence of the surface field Hp generated by Jd correctly describes the motion of domain walls (as evidenced from dM/dt versus H curves) and the variations of the macroscopic parameters such as the coercive field Hc and the position of the center of the M-H loop, C with Hp can be explained in terms of these motions. Moreover the numerical values of the parameters which govern the magnetization processes at lower H are deduced from these variations. Therefore the model presents a tool for the study (and improvement) of amorphous ribbons. The deviations from the model predictions occurring in Co70, 3Fe4, 7Si15B10 alloy at elevated Hp are explained in terms of the influence of Hp on the domain structure of this alloy.

amorphous materials ; magnetic properties

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