Abstract

It has been shown that locally measuring coercive force \({{H}_{{\text{c}}}}\) based on the magnitude of demagnetizing current has a fundamental limitation on the measurement range. We have demonstrated the expediency of measuring coercive force in ferromagnetic objects locally, based on the magnitude of the tangential component of the magnetic field in the interpole space on the surface of the test object, that is, based on the internal field. This allows one to expand the range of measured values \({{H}_{{\text{c}}}}\) by several times. Also, the influence of the gap between the transducer and the object, as well as the shape and size of test objects on the measurement results is significantly reduced. This makes it possible to measure the absolute values of \({{H}_{{\text{c}}}}\) of homogeneous ferromagnetic objects, as well as the coercive force of objects with nonferromagnetic coatings of considerable thickness.

中文翻译：

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基于内场的铁磁物体矫顽力局部测量的优势

摘要

已经表明，基于消磁电流的大小局部测量矫顽力\（{{H} _ {{\ text {c}}}} \\）对测量范围有根本的限制。我们已经证明了根据测试对象表面的极间空间中磁场的切向分量的大小（即基于内部磁场）在局部测量铁磁对象中的矫顽力的简便方法。这样一来，就可以将测量值\（{{H} _ {{\ text {c}}}} \\）的范围扩大几倍。而且，显着减小了换能器与物体之间的间隙以及测试物体的形状和尺寸对测量结果的影响。这样就可以测量的绝对值均匀铁磁物体的\（{{H} _ {{\ text {c}}}}} \），以及具有相当厚度的非铁磁涂层的物体的矫顽力。