通过几个近零磁伸非晶环样磁滞回线的偏移随测前磁操作变化的实验研究,指出经过420℃以上退火的样品,磁滞回线的偏移与非晶母体内析出高H_c微晶有关,而通过适当的退磁和冲击磁化的操作,可以不同程度地消除偏移,消偏磁滞回线的H_c随所用磁操作而变。
Several nearly zero-magnetostrictive non-crystalline toroidal samples have been examined for the shift of hysteresis loops changed by the magnetic operations prior to their measurements. It is shown that the loop shift of the samples annealed over 420℃ is related to the precipitation of crystallites with high H_c from the non-crystalline matrix. It can be eliminated to a certain extent by means of some suitable demagnetizing or shock-magnetizing, and the H_c of the shift-eliminated loops varies with the operations preformed.
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