Bubble domains in double garnet films

Abstract

The properties of bubble domain lattices in magnetostatically coupled double garnet films are investigated. The calculated static properties of bubble lattices in both single and double garnet films are compared with the results of experiments on three double-film composites. The differences in behavior between the three composite structures, chosen to exhibit varying degrees of magnetostatic coupling, are explained quantitatively in terms of the interaction fields between bubble domains in the two magnetic films. The dependence of bubble diameter on the applied bias field has been investigated experimentally and agreement with theory is good. Stable bias field ranges for bubble lattices are also examined. Effects such as the ordering of double-bubble lattices, changes in bubble size upon coupling, and experimental observation of bubble repulsion and attraction effects are explained qualitatively. Some results on novel stacking arrangements of overlying bubble lattices and the dependence of bubble spacing in a lattice on the method of generation are briefly discussed. © 1974 American Institute of Physics.