Several Experiments on the Permalloy Problem

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概要

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• We have found from the two experiments that a little above 490℃ the internal stress grows enough to fix the magnetic domains and utterly decrease initial permeability. The same initial permeability decrease was observed by Dr. Kaya and others when specimens, quenched from 600℃, were kept at 490℃ for a few minutes. In this case too, we can expect only nuclei of superlattice may exist. Now we know from our experiments that the magnetic domains are also fixed at the same stage of superlattice formation. The term "internal stress" we used above is a vague word. We mean by it the force or atom arrangement which minimize the free energy of the magnetic domain with regard to some special direction. But theoretical relation between internal stress and initial permeablity is not clear. The theories of R. Becker and others are not reliable in this case, because they are based on some special conditions. Closing this short paper we want to express sincere thanks to Dr. Kaya and members of his laboratory for their encouragement and support.

• 社団法人日本物理学会の論文
• 1950-01-10

著者

• Tomono Yuzo

  Physical Department Faculty Of Science University Of Tokyo

関連論文

• Several Experiments on the Permalloy Problem
• The Temperature Dependence of Initial Permeability of Iron Single Crystals under External Tension

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