Anisotropy influence on the rotational and alternating field behavior of soft magnetic materials

Magnetic losses of three soft magnetic materials, grain-oriented SiFe, nonoriented SiFe, and cubic-textured NiFe, are measured under 50 Hz sinusoidal and rotational induction conditions. It is found that, for the NiFe, the losses obtained under 1-D or 2-D excitations are always lower than the sum of the alternating ones measured along the rolling and transverse directions of the sheet. For the SiFe samples, the principle of superposition is valid only up to 1.0 T. this behavior can be connected directly to the magnetocrystalline anisotropy of the material, which is about 30 times higher for the SiFe than the NiFe and controls the magnetization processes.>