Different surface domain structures of inhomogenious films of Yttrium Iron Garnet (YIG). YIG film has substantial variation of anisotropy field across the film thickness.

Images courtesy of A.G. Temiryazev and M.P. Tikhomirova,
Institute of Radioengineering & Electronics RAS, Fryazino, Russia.

A.G. Temiryazev et al. Proceedings of SPM-2002, Nizhnii Novgorod, Russia, 129-131.