Ferromagnetism in the ferromagnetic yttrium iron garnet film/ferromagnetic intermetallic compound heterostructure

We report on the investigations of the magnetic properties and ferromagnetic resonance in the heterostructure consisting of an epitaxial yttrium iron garnet (Y$_{3}$Fe$_{5}$O$_{12}$) film and a nanometer rare-earth intermetallic superlattice comprised of the (TbCo$_{2}$/FeCo)$_{n}$ exchange-coupled layers. The (TbCo$_{2}$/FeCo)$_{n}$ superlattice exhibits the giant magnetostriction and the controlled magnetic anisotropy induced by a magnetic field or elastic stresses. The magnetic interaction of the films in the (TbCo$_{2}$/FeCo)$_{n}$/Y$_{3}$Fe$_{5}$O$_{12}$ heterostructure has been experimentally established and the spin current flowing through their interface has been detected.