Spin pumping in YIG/Pt bilayers as a function of layer thickness

被引：83

作者：

Haertinger, M. ^{[1
]}

Back, C. H. ^{[1
]}

Lotze, J. ^{[2
,3
]}

Weiler, M. ^{[2
]}

Gepraegs, S. ^{[2
]}

Huebl, H. ^{[2
]}

Goennenwein, S. T. B. ^{[2
,4
]}

Woltersdorf, G. ^{[1
,5
]}

机构：

[1] Univ Regensburg, Dept Phys, D-93053 Regensburg, Germany

[2] Bayer Akad Wissensch, Walter Meissner Inst, D-85748 Garching, Germany

[3] Tech Univ Munich, Phys Dept, D-85748 Garching, Germany

[4] NIM, D-80799 Munich, Germany

[5] Univ Halle Wittenberg, Inst Phys, D-06120 Halle, Germany

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 05期

关键词：

FERROMAGNETIC-RESONANCE;

D O I：

10.1103/PhysRevB.92.054437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We systematically investigate the spin-pumping effect in a series of yttrium-iron-garnet (YIG)-platinum (Pt) bilayers, comparing both broadband ferromagnetic resonance and electrically detected spin-pumping experiments. We infer the effective spin-mixing conductance as a function of YIG and Pt layer thickness from ferromagnetic resonance measurements on pure YIG layers as well as on bilayer YIG/Pt samples in a frequency range from 2 to 20 GHz. In bare YIG films, we determine a Gilbert damping constant of approximately alpha = 0.001. With an additional platinum layer on top of the YIG samples, the damping is significantly enhanced. The effective spin-mixing conductance extracted from the ferromagnetic resonance experiments is in agreement with that determined from independent electrically detected spin-pumping experiments.

引用

页数：6

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