Similarity rules of magnetic minor hysteresis loops in Fe and Ni metals |
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Authors: | S Takahashi S Kobayashi Y Kamada T Shishido |
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Institution: | 1. Faculty of Engineering, NDE & Science Research Center, Iwate University, 4-3-5 Ueda, Morioka 020-8551, Japan;2. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan |
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Abstract: | We have studied similarity rules of quasistatic minor hysteresis loops for Fe and Ni single crystals in the wide temperature range from 10 to 600 K. Two similarity rules of MR*/Ma*∼3/4 and WR*/WF*∼1/6, were found in a medium field range where irreversible movement of Bloch walls plays a crucial role for magnetization; Ma*, MR*, WF*, and WR* are magnetization, remanence, hysteresis loss, and remanence work of a minor hysteresis loop. The similarity rules hold true, being almost independent of kinds of ferromagnets, applied stress, and temperature. The origin was discussed from the viewpoint of pinning effects due to dislocations as well as eddy current effects which become predominant at low temperatures for samples with low dislocation density. |
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Keywords: | 75 60 Ej 75 50 Bb 75 50Cc 75 60 Jk |
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