【摘要】 用毕特粉紋技术研究了軋辊淬火法制备的非晶态(Fe_xNi_1-x)₇₈Si₅B₁₄和Fe₄₀Ni₄₀P₁₄B₆合金的磁畴結构,在这些合金样品表面观察到畴壁垂直軋向的磁畴。畴結构主要与从熔态合金淬火过程产生的不均勻单軸各向异性有关。这种各向异性是通过正磁致伸縮与样品的内应力间的磁弹性耦合产生的。样品經退火或磁退火后,这种类型畴的数量随退火温度增加而减少,导致磁化率和剩磁增加。在非晶态Fe₄₀Ni₄₀P₁₄B₆合金样品表面还观察到少量指紋状“迷陣”畴。内应力对磁畴結构影响非常明显。我們观察了針孔和剪口附近的畴結构。更多还原

【Abstract】 The domain structure of amorphous (FexNi_1-x)₇₈Si₈B₁₄ and Fe₄₀Ni₄₀P₁₄B₆ alloys produced by roller quenching technique were studied by means of Bitter powder technique.The domain with wall perpendicular to the rolling direction were observed on the surfaee ribbons made of these alloys. The domain structure was seen to be dominated by the presence of non-uniform uniaxial anisotropy which was related to the flow processes induced by quenching the molten alloy. The cause of this anisotropy was supposed to be due to the magnetoelastic coupling between positive magnetostriction and internal stress in the specimen.After the samples were annealed or magnetically annealed, the domain of this type decreased in amount as the annealing temperature increased, while the value of the susceptibility and that of the remanent magnetization were increased.A limited amount of fingerprint type "maze-pattern" domain was also observedon the surface of amorphous Fe₄₀Ni₄₀P₁₄B₆ alloy.The stress effect on the domain structure was quite obvious. We observed the domain structure around a pin hole made by a needle and a seam made by scissors.更多还原