Magnetic gratings in garnets in spatially periodic effective and real magnetic field

Formation of magnetic gratings in epitaxial garnet films (EGF) in spatially periodic magnetic field is investigated. Two cases of influence on the domain structure of the EGF are taken into account: (i) spatially periodic effective magnetic field of photoinduced magnetic anisotropy; (ii) real spatially periodic magnetic field. The first one appears at illumination of photomagnetic EGF with superposition of two coherent linearly polarized light beams. Experimental modelling was carried out using real spatially periodic fringing field from a magnetic tape.