Ferromagnetic Resonance in BTO-BFO Films Grown on LSMO*

We synthesized epitaxial BTO-BFO films grown on LSMO with decreased leakage and improved multiferroic properties. This work provides new direction for ferromagnetic resonance studies in high quality BTO-BFO films. We observed small Gilbert damping ( α=0.004) and the absence of large inhomogeneous broadening, in a film with 80 nm thickness of BTO-BFO on LSMO (110). Magnetic insulators, such as BTO-BFO are potentially excellent candidates for pure spin current without the existence of charge current.This new materials system can provid opportunities for spin transfer in multifunctional materials where controlling magnetization or spin current, is crucial toward for developing nanoscale spin-based memory and devices.