Proceedings of the International School of Physics "Enrico Fermi.", Volume 70

absorption angle anisotropy Appl applied assumed axis Bloch lines bubble calculated causes centres composition consider constants contribution corresponding coupling crystal cubic curve dependence determined direction discussed distribution domain effects electron energy equation exchange experiment experimental expression Fe2+ Fe3+ ions ferrimagnetic field film function GELLER give given ground increases interaction iron garnets Journ lattice levels light magnetic field magnitude material measurements mode moments motion normal observed obtained occur octahedral orientation parallel parameter photoinduced Phys plane polarization position properties rare-earth ions region relation relaxation represents resonance respectively rotation sample shown in fig shows space group specimens spin wave spontaneous spontaneous magnetization structure sublattice substitution surface symmetry temperature tetrahedral theory tion torque transition uniaxial unit values variation wall yttrium iron garnet