Spin Interactions at the Interfaces Ferromagnetic Oxide/Ferromagnetic Intermetallic Superlattice

Abstract

The magnetic properties of the heterostructures consisting of platinum Pt, epitaxially grown manganite optimally doped by strontium La 0.7 Sr 0.3 MnO 3 (LSMO), rare earth intermetallic superlattices consisting of exchange-coupled layers TbCo 2 /FeCo (TCFC), and the epitaxial film of yttrium iron garnet Y 3 Fe 5 O1 2 (YIG) were investigated. The TCFC material provides giant magnetostriction, large magnitude of the magnetomechanical coupling coefficient, and controlled induced magnetic anisotropy. In addition TCFC, as well as Pt, has strong spin-orbit interaction. Experimental studies have shown that the magnetic interaction of the heterostructure (TeCo 2 / FeCo)n/LSMO has an antiferromagnetic character. An increase of linewidth of the ferromagnetic resonance in the Pt/LSMO structure was observed and explained by the spin current flow induced in Pt film by the LSMO film at ferromagnetic resonance. In the TCFC/YIG heterostructure, an electric voltage induced in the TCFC film was observed and explained by the inverse spin-Hall effect under conditions of ferromagnetic resonance.