Minor Hysteresis Loops and Bloch Wall Potential in a Fe Single Crystal

抄録

The minor hysteresis loops were measured with increasing magnetic field amplitude, H_a, step by step and analyzed in connection with the lattice defects such as dislocations in Fe single crystal. We defined pseudo coercive force H_c^*, susceptibility χ_H^* at H_c^*, pseudo hysteresis loss W_F^*, pseudo remanence B_R^*, pseudo remanence work W_R^*, susceptibility χ_R^* at B_R^*, and pseudo magnetization B_a^* at H_a in the minor loop. H_c^* is the magnetic field where the magnetization becomes zero in a minor loop. A simple relation, 2H_c^*=H_a, was experimentally obtained in a wide H_a range. These parameters reflect simple Bloch wall potential on the supposition that Bloch walls receive force from the same potential; the potential is the average one of individual Bloch wall. The initial stage of potential is concluded to be irreversible from the magnetic pseudo properties.