Large spin pumping from epitaxial Y 3 Fe 5 O 12 thin films to Pt and W layers
Large spin pumping from epitaxial Y 3 Fe 5 O 12 thin films to Pt and W layers
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DOI：
10.1103/physrevb.88.100406
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发表时间：
2013-07
影响因子：
3.7
通讯作者：
Hailong Wang;C. Du;Yong Pu;R. Adur;P. Hammel;Fengyuan Yang
中科院分区：
文献类型：
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作者：
Hailong Wang;C. Du;Yong Pu;R. Adur;P. Hammel;Fengyuan Yang
Epitaxial Y${}_{3}$Fe${}_{5}$O${}_{12}$ thin films deposited by off-axis sputtering exhibit excellent crystalline quality enabling observation of large spin pumping signals in Pt/Y${}_{3}$Fe${}_{5}$O${}_{12}$ and W/Y${}_{3}$Fe${}_{5}$O${}_{12}$ bilayers driven by cavity ferromagnetic resonance. The inverse spin Hall voltages reach 2.10 and \ensuremath{-}5.26 mV in 5-mm-long Pt/Y${}_{3}$Fe${}_{5}$O${}_{12}$ and W/Y${}_{3}$Fe${}_{5}$O${}_{12}$ bilayers, respectively, excited by a radio-frequency magnetic field of 0.3 Oe. From the ferromagnetic resonance linewidth broadening, we obtain high interfacial spin mixing conductances of 4.56\ifmmode\times\else\texttimes\fi{}10${}^{14}$ and 2.30\ifmmode\times\else\texttimes\fi{}10${}^{14}$ ${\ensuremath{\Omega}}^{\ensuremath{-}1}$ m${}^{\ensuremath{-}2}$ for Pt/Y${}_{3}$Fe${}_{5}$O${}_{12}$ and W/Y${}_{3}$Fe${}_{5}$O${}_{12}$ bilayers, respectively.
Epitaxial Y${}_{3}$Fe${}_{5}$O${}_{12}$ thin films deposited by off-axis sputtering exhibit excellent crystalline quality enabling observation of large spin pumping signals in Pt/Y${}_{3}$Fe${}_{5}$O${}_{12}$ and W/Y${}_{3}$Fe${}_{5}$O${}_{12}$ bilayers driven by cavity ferromagnetic resonance. The inverse spin Hall voltages reach 2.10 and \ensuremath{-}5.26 mV in 5-mm-long Pt/Y${}_{3}$Fe${}_{5}$O${}_{12}$ and W/Y${}_{3}$Fe${}_{5}$O${}_{12}$ bilayers, respectively, excited by a radio-frequency magnetic field of 0.3 Oe. From the ferromagnetic resonance linewidth broadening, we obtain high interfacial spin mixing conductances of 4.56\ifmmode\times\else\texttimes\fi{}10${}^{14}$ and 2.30\ifmmode\times\else\texttimes\fi{}10${}^{14}$ ${\ensuremath{\Omega}}^{\ensuremath{-}1}$ m${}^{\ensuremath{-}2}$ for Pt/Y${}_{3}$Fe${}_{5}$O${}_{12}$ and W/Y${}_{3}$Fe${}_{5}$O${}_{12}$ bilayers, respectively.