Magnetic Domain Wall Dynamics

这项研究的主要目的是改善对与磁泡磁畴相关的Bloch壁结构和亚结构的理解，重点是只有当壁是INM运动时才会发生的动态效应。通过与泡泡存储系统公司Magneys的合作，这项研究工作将与他们在未来十年实现千兆位垂直Bloch行存储系统的计划相结合。壁面动力学的研究将在(111)和(110)取向的磁性石榴石上进行，这些磁性石榴石已经用于或计划用于磁泡和Bloch线磁存储器。当气泡在外加磁场梯度的影响下沿均匀的圆形路径运动时，将对处于稳态运动的气泡中的壁面结构进行动态观察。这些场梯度是由合适的导体图案产生的，这些导体图案很容易在我们的实验室制作。这项由普渡大学开发的实验技术提供了一种独特的方法来确定动态磁区壁结构的细节，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.