Optical determination of spin diffusion length and interfacial spin mixing conductance in epitaxial Pd/Fe bilayers

We present a detailed study of the photoinduced magnetization precession and magnetic relaxation in epitaxial Pd/Fe films on MgO(0 0 1) substrates via all-optical pump-probe techniques. We explicitly formulate the correlation between the Gilbert damping and the effective damping in the optical appro...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2019-07, Vol.31 (30), p.305802-305802
Main Authors: Li, Y, Zhang, W, Li, N, Sun, R, Tang, J, Gong, Z Z, Yang, X, Xie, Z K, Gul, Q, Zhang, X Q, He, W, Cheng, Z H
Format: Article
Language:English
Subjects:
damping
epitaxial films
spin diffusion length
spin mixing conductance
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Summary:We present a detailed study of the photoinduced magnetization precession and magnetic relaxation in epitaxial Pd/Fe films on MgO(0 0 1) 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 relationship of damping with Fe thickness . The non-local Gilbert damping enables the determination of spin diffusion length in Pd and interfacial spin mixing conductance . Our work paves the way toward the optical determination of spin transport parameters.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ab1a99