面内磁场中垂直布洛赫线的消失

当面内磁场大于某一阈值H_in′时,硬磁泡和硬畴段将变为正常泡和段。我们测量了不同磁泡材料的H_in′。随垂直于膜面直流偏磁场的增大,H_in′减小。观察到这种转变是一种弛豫过程,在适当条件下可以持续数秒或数十秒。采用Slonczewski和Malozemoff提出的面内场布洛赫点形核的概念对得到的实验结果做了定性的解释。 关键词：

ANNIHILATION OF VERTICAL BLOCH LINES IN IN-PLANE FIELD

Hard bubbles and hard wall segments will transform into normal ones, if an in-plane field is larger than a threshold value H_in. We measured the H_in values for some as-grown magnetic bubble materials. As d.c, magnetic bias field perpendiculer to the film increases, H_in decreases. It has been shown that the transformation from hard bubbles and hard wall segments into normal ones is a relaxation proccess which may last for a few seconds or more. The above results were explained qualitatively in terms of the concept of field-nucleated Bloch points suggested by Slonczewski and Maloze-moff.