Magnetic Domain Wall Dynamics

研究的主要目的是提高对与磁泡域相关的布洛赫壁结构和亚结构的理解，主要强调仅在壁处于运动状态时才发生的动态效应。通过与泡泡存储系统公司Magnesys的合作，这项研究工作将与他们在未来十年实现千兆垂直Bloch线存储系统的计划相结合。壁动力学研究将在（111）和（110）取向磁性石榴石上进行，这些石榴石已被用于或拟用于气泡和布洛赫线磁存储器。当气泡在外加场梯度的影响下沿均匀圆形路径运动时，将对处于稳定运动的气泡中的壁结构进行动态观察。这些场梯度是由合适的导体模式产生的，在我们的实验室里很容易制作。这项实验技术由普渡大学开发，提供了一种独特的方法来确定动态畴壁结构的细节，如垂直布洛赫线的数量和符号。

The principal objective of the research is an improved understanding of the Bloch wall structure and substructure associated with magnetic bubble domains with major emphasis on dynamic effects which occur only when the walls are inm motion. Through a cooperative effort with Magnesys, a Bubble Memory Systems Company, this research effort will be integrated with their plans to achieve gigabit vertical Bloch line memory systems in the next decade. The study of wall dynamics will be carried out on (111) and (110)- oriented magnetic garnets as have been used, or proposed for use in bubble and Bloch line magnetic memories. Dynamic observations will be carried out on wall structures in bubbles which are in steady motion, achieved when a bubble moves in a uniform circular path under the influence of applied field gradients. These field gradients are produced by suitable conductor patterns, readily made in our laboratories. This experimental technique, developed at Purdue University, provides a unique method to determine details of the dynamical domain wall structure such as the number and sign of vertical Bloch lines.