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矫顽力在H_a范围附近时,场强充布的异常现象和剩余场的异常现象图7记录了_JH_c=11.68 Oe的硬磁性Cr钢在施加场H_a=10 Oe时的内场。在此情形下,H_a≈_JH_e。图7中,裂纹内场强充布的情况与图6有很大不同。在图6中,施加场强H_a比矫顽力约大五十倍。从作为施加场H_a≈_JH_c的举例图7上可观察到下述一些事实。在H_a=O往上至_JH_c场强充布的第一阶段,这些事实已被证明是典型的。
Abnormal phenomena of field strength charge and residual field anomaly when the coercive force is in the vicinity of H_a Fig. 7 records the internal field of the hard magnetic Cr steel with _JH_c = 11.68 Oe at applied field H_a = 10 Oe. In this case, H_a≈_JH_e. In Fig. 7, the situation where the crack infiltration is strong is different from that of Fig. 6. In FIG. 6, the applied field strength H_a is about fifty times greater than the coercive force. The following facts can be observed from FIG. 7 as an example of applying the field H_a≈_JH_c. These facts have proved to be typical in the first phase of H_a = O up to _JH_c field strength.