Spin transport and dynamics in all-oxide perovskite La2/3Sr1/3MnO3/SrRuO3 bilayers probed by ferromagnetic resonance

被引：43

作者：

Emori, Satoru ^{[1
]}

Alaan, Urusa S. ^{[1
,2
]}

Gray, Matthew T. ^{[1
,2
]}

Sluka, Volker ^{[3
]}

Chen, Yizhang ^{[3
]}

Kent, Andrew D. ^{[3
]}

Suzuki, Y. ^{[1
,4
]}

机构：

[1] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[3] NYU, Dept Phys, 4 Washington Pl, New York, NY 10003 USA

[4] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 22期

基金：

美国国家科学基金会;

关键词：

THIN-FILMS; INTERFACES;

D O I：

10.1103/PhysRevB.94.224423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thin films of perovskite oxides offer the possibility of combining emerging concepts of strongly correlated electron phenomena and spin current in magnetic devices. However, spin transport and magnetization dynamics in these complex oxide materials are not well understood. Here, we experimentally quantify spin transport parameters and magnetization damping in epitaxial perovskite ferromagnet/paramagnet bilayers of La2/3Sr1/3MnO3/SrRuO3 (LSMO/SRO) by broadband ferromagnetic resonance spectroscopy. From the SRO thickness dependence of the Gilbert damping, we estimate a short spin diffusion length of less than or similar to 1 nm in SRO and an interfacial spin-mixing conductance comparable to other ferromagnet/paramagnetic-metal bilayers. Moreover, we find that anisotropic non-Gilbert damping due to two-magnon scattering also increases with the addition of SRO. Our results demonstrate LSMO/SRO as a spin-source/spin-sink system that may be a foundation for examining spin-current transport in various perovskite heterostructures.

引用

页数：9

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