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Spin current generation from sputtered Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$ films

Lustikova, J.*; Shiomi, Yuki*; Qiu, Z.*; Kikkawa, Takashi*; Iguchi, Ryo*; Uchida, Kenichi*; Saito, Eiji

Spin current injection from sputtered yttrium iron garnet (YIG) films into an adjacent platinum layer has been investigated by means of the spin pumping and the spin Seebeck effects. Films witha thickness of 83 and 96 nanometers were fabricated by on-axis magnetron rf sputtering at room temperature and subsequent post-annealing. From the frequency dependence of the ferromagneticresonance linewidth, the damping constant has been estimated to be (7.0$$pm$$1.0) $$times$$ 10$$^{-4}$$. Magnitudes of the spin current generated by the spin pumping and the spin Seebeck effect are ofthe same order as values for YIG films prepared by liquid phase epitaxy. The efficient spin current injection can be ascribed to a good YIG/Pt interface, which is confirmed by the large spin-mixingconductance (2.0 $$pm$$ 0.2) $$times$$ 10$$^{18}$$ m$$^{-2}$$.

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Category:Physics, Applied

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