Browsing by Author "Vilela, G. L. S."

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    Magnon-mediated spin currents in Tm3Fe5O12/Pt with perpendicular magnetic anisotropy
    (2020) Vilela, G. L. S.; Abrao, J. E.; Santos, E.; Yao, Y.; Mendes, J. B. S.; Rodríguez Suárez, Roberto; Rezende, S. M.; Han, W.; Azevedo, A.; Moodera, J. S.
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    Spin pumping contribution to the magnetization damping in Tm3Fe5O12/W bilayers
    (2022) Oliveira, A. B.; Rodriguez-Suarez, R. L.; Vilela-Leao, L. H.; Vilela, G. L. S.; Gamino, M.; Silva, E. F.; Bohn, F.; Correa, M. A.; Moodera, J. S.; Chesman, C.
    In this work, thulium iron garnet (Tm3Fe5O12 - TmIG (20 nm)/Tungsten(W)(t) bilayers, sputtered on top of gadolinium gallium garnet (111) substrate, were used to investigate spin pumping (SP) line broadening mechanism in Ferromagnetic Resonance (FMR). The TmIG, films prior and after tungsten cap layer deposition, were investigated employing FMR and X-ray diffraction techniques. The TmIG films showed (1 1 1) orientation and perpendicular magnetic anisotropy (PMA). Due to the interface TmIG/W, when the TmIG magnetization is in resonance a spin current is pumped out the TmIG into the W layer, increasing the damping of the magnetization. Measuring the out-of-plane angular dependence of the FMR resonance field and linewidth, we were able to obtain solely the SP contribution to the line broadening, filtering Gilbert, mosaicity, and two magnon scattering mechanisms.