Observation of various types of bubbles bounded by a compensation wall

A number of new domains and domain aggregates have been observed in LPE-films with an overall composition of (Y,La)3(Fe,Ga)5O12,and consist of sublayers with varying distribution of Ga over the octahedral and tetrahedral sites. The sublayers are separated by compensation planes. In this structure, bubbles with opposite sense of Faraday rotation ("white" and "black" bubbles) can exist simultaneously. Other observations include combinations of these bubbles, and a new type of attractive interaction between bubbles. A simple model and some calculations are given.