Long-period solitonic lattice in the rare earth orthoferrite TbFeO3

Rare earth orthoferrites show a variety of magnetic transitions and spectacular magneto-electric effects originating from the coupling between the iron and rare earth magnetic sublattices. Our recent single-crystal neutron diffraction measurements revealed the presence of an unusual incommensurate phase in TbFeO3, which is induced by the magnetic field along the c axis and has a period of about 100 unit cells. We also present the results of model calculations, which explain the origin of this novel phase and reproduce the magnetic phase diagram of TbFeO3.