G - Physics
11
C
352/37.3
G11C 11/14 (2006.01) G11C 19/08 (2006.01)
Patent
CA 1046635
DISK GENERATOR ABSTRACT OF THE DISCLOSURE A one level, replication generator for cylindrical, single wall magnetic domains or "bubble" domains comprises a disk and a conductor that connects the disk to the elements of an adjacent bubble domain propagation path. The disk and conductor can be formed from permalloy while the propagation path, which typically comprises chevron-shaped elements, can also be formed from permalloy. The conductor and disk can be formed to the same level. That is, they can be formed using a one-mask fabrication process, thus precluding the problems of alignment where several mask sequences are used. In operation, a bubble domain seed circulates about the disk under the influence of a cyclically varying, in- plane magnetic drive field. When the drive field is at a suitable orientation, a current pulse is applied to the conductor to cause the bubble domain to strip out to the propagation track. Upon application of a pulse of reversed polarity, the stretched domain is cut, allowing the severed domain to propagate along the track and the seed domain to continue around the disk.
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