Optical determination of spin diffusion length and interfacial spin mixing conductance in epitaxial Pd/Fe bilayers
Optical determination of spin diffusion length and interfacial spin mixing conductance in epitaxial Pd/Fe bilayers
复制标题
外延 Pd/Fe 双层中自旋扩散长度和界面自旋混合电导的光学测定
DOI：
10.1088/1361-648x/ab1a99
复制
发表时间：
2019-07-31
影响因子：
2.7
通讯作者：
Cheng, Z. H.
中科院分区：
文献类型：
--
作者：
Li, Y.;Zhang, W.;Cheng, Z. H.
We present a detailed study of the photoinduced magnetization precession and magnetic relaxation in epitaxial Pd/Fe films on MgO(001) substrates via all-optical pump-probe techniques. We explicitly formulate the correlation between the Gilbert damping and the effective damping in the optical approach. Furthermore, a non-local Gilbert damping induced by spin pumping is demonstrated self-consistently by the Gilbert damping dependence on Pd thickness and the 1/d(Fe) relationship of damping with Fe thickness d(Fe). The non-local Gilbert damping enables the determination of spin diffusion length lambda(SD) = (7.4 +/- 3.0) nm in Pd and interfacial spin mixing conductance g up down arrow = (2.7 +/- 0.4) x 10(19) m(-2). Our work paves the way toward the optical determination of spin transport parameters.
