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本文用粉纹法仔细研究了晶粒取向3％Si-Fe中,几种典型畴结构随所施压应力的变化。指出沿轧向施加的压应力使主畴处于能量极为不利的地位,遂引起畴结构根本性的改变,即横向畴核(沿与施力方向垂直的易轴磁化)长大,变为主要的畴结构。本文对压应力感生的两类横向畴(横向条状畴及“人字形”畴)的成因进行了探讨,并提出相应畴结构的模型。

The compression effect on domain structure of grain oriented 3%Si-Fe was studied. As well known that if a compression is applied along rolling direction, then the domain magnetized along [001] would be energetically unfavourable. In that case the transverse domains magnetized along [100] or [010] are energetically favourable. So the latter would grow by the wall moving of the nuclei of transverse domains and become the main domain structure. As for the former main domain structure, then it would be degenerated into supplementary. Such stripe like pattern, which is parallel to [110], is so called transverse stripe pattern. With further increase of compression, these transverse stripe pattern would be broken into two groups of differently aligned tilting domain fragments, gradually. There are some correlations between the alignment of these tilting domain fragments and the crystallographic orientations. These two groups of tilting domain fragments intertwine with each other in rows and they are looked ike "λ". The higher the compression, the greater the volume fraction of "λ" domains. The row width and the space of domain fragment itself are also reduced with increase of compression. The cause of formation of such domains is discussed in the light of energy consideration. A model of "λ" domain structure is proposed in the present work.ě