Magnetiostatic interactions in some bubble-domain propagation circuits

Cylindrical magnetic domain (CMD) propagation actually comes to the generation of magnetostatic traps (MST) which successively "capture" the domains on their way along the propagation path. There are three types of MST which correspond to three types of magnetostatic interactions between a domain magnetization and "active" elements of propagation circuits. An interaction of CMD magnetization with ferromagnetic overlay (the third type of an interaction) can generate MST with the maximum depth of approximately 16 Oe. NIST depth in practical propagation circuits is bound to be 6-10 Oe. The data rate upper limit for the techniques using the interaction of CMD and ferromagnetic overlay is determined by the minimum time interval necessary for domain capture by MST and for orthoferrites, which is approximately 1 Mbit/s. The rare-earth orthoferrite single crystals synthesized by the floating zone technique were used throughout the experiments.