Abstract
The scaling law of minor loops was studied on an amorphous alloy Co66Fe3Cr3Si15B13 with a very high initial permeability (more than 150000) and low coercivity (about 0.1 A/m). An analytical expression for the coercive force in the Rayleigh region was derived. The coercive force is connected with the maximal magnetic field Hmax via the reversibility coefficient μi/ηHmax. Reversibility coefficient shows the relationship between reversible and irreversible magnetization processes. A universal dependence of magnetic losses for hysteresis Wh on the remanence Br with a power factor of 1.35 is confirmed for a wide range of magnetic fields strengths.
Highlights
Regularities of changes of minor magnetic hysteresis loops depending on the amplitude of magnetic field or frequency can provide useful information on the magnetization processes in a magnetic material
The results of measurements are placed in columns: Bmax is the maximal induction, Hmax is the maximal magnetic field, Br is the remanence, Hc is the coercive force, W h is the area of the static hysteresis loop
An interrelation of the parameters of minor hysteresis loops was investigated for the case of the amorphous alloy Co66Fe3Cr3Si15B13 with a very high initial permeability and low coercive force
Summary
Regularities of changes of minor magnetic hysteresis loops depending on the amplitude of magnetic field or frequency can provide useful information on the magnetization processes in a magnetic material. The scaling law of minor loops is intensively applied for the investigation of different magnetic materials.[1,2,3,4,5,6,7] In this regard, it is of interest to study regularities of parametric changes of a set of minor loops in the amorphous Co66Fe3Cr3Si15B13 alloy with a very high initial permeability (more than 150000) and low coercivity (about 0.1 A/m).[8] High soft magnetic properties in this alloy are reached at the expense of a very low magnetic anisotropy constant This is connected with the absence of crystallographic anisotropy in amorphous materials and of magnetoelastic anisotropy in the Co-based alloy because of a close-to-zero magnetostriction constant and low Curie temperature (about 415 K). Numerical changes in the power factor s in formula (1) are controlled by different types of the magnetization reversal process.[1,2,10]
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