可逆磁化区对退磁过程的影响研究

大学物理 ›› 2011, Vol. 30 ›› Issue (12): 45-45.

可逆磁化区对退磁过程的影响研究

邹俭英[1] 李洪宇[2]

[1]中国石油大学华东物理学院,山东青岛266555 [2]山东科技大学机电学院,山东青岛266510

出版日期:2011-12-25 发布日期:2011-12-20

Study on effects of reversible magnetic area on demagnetization process

Online:2011-12-25 Published:2011-12-20

摘要/Abstract

摘要： 静态磁化曲线与磁滞回线测量实验中，材料剩磁较小时（不超过2．5mT）所需加的反向外磁场强度不易把握，很难实现完全退磁．结合原理，本文对退磁过程和可逆磁化区的关系进行了定量研究，结果表明：退磁过程所需加的最小有效反向外磁场强度与可逆磁化区到不可逆磁化区的临界外磁场强度近似相等，且该值接近材料矫顽力的0．55倍．

关键词: 退磁, 可逆磁化区, 有效反向外磁场, 矫顽力

Abstract: It is not easy to determine the value of the needed reverse external magnetic field in the experiment of static magnetization curve and magnetic hysteresis curve measurement, when the remanent magnetism is very little （ no more than 2.5mT）, so it is hard to realize complete demagnetization. After analysis of the related theory, this paper makes a quantitative study on the relation of demagnetization process and reversible magnetic area. The results have shown that the effective, reverse, minimum external magnetic intensity is approximately equal to the critical external magnetic intensity of reversible and irreversible magnetic area, and the value is nearly 0.55 times of coercive force of the material.

Key words: demagnetization, reversible magnetic area, effective reverse external magnetization, coercive force

中图分类号:

O482.52

邹俭英[] 李洪宇[]. 可逆磁化区对退磁过程的影响研究[J]. 大学物理, 2011, 30(12): 45-45.

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