Radiative damping in waveguide-based ferromagnetic resonance measured via analysis of perpendicular standing spin waves in sputtered permalloy films

被引：102

作者：

Schoen, Martin A. W. ^{[1
,2
]}

Shaw, Justin M. ^{[1
]}

Nembach, Hans T. ^{[1
]}

Weiler, Mathias ^{[3
]}

Silva, T. J. ^{[1
]}

机构：

[1] NIST, Electromagnet Div, Boulder, CO 80305 USA

[2] Univ Regensburg, Inst Expt & Appl Phys, D-93053 Regensburg, Germany

[3] Bayer Akad Wissensch, Walther Meissner Inst, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 18期

关键词：

SURFACE ANISOTROPY; BOUNDARY-CONDITION; EDDY CURRENT; FREQUENCY;

D O I：

10.1103/PhysRevB.92.184417

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The damping a of the spin-wave resonances in 75, 120, and 200 nm thick permalloy films is measured via vector-network-analyzer ferromagnetic resonance (VNA-FMR) in the out-of-plane geometry. Inductive coupling between the sample and the waveguide leads to an additional radiative damping term. The radiative contribution to the over-all damping is determined by measuring perpendicular standing spin waves (PSSWs) in the permalloy films, and the results are compared to a simple analytical model. The damping of the PSSWs can be fully explained by three contributions to the damping: the intrinsic damping, the eddy-current damping, and the radiative damping. It was not necessary to invoke any additional damping contributions to explain the data. Furthermore, a method to determine the radiative damping in FMR measurements with a single resonance is suggested.

引用

页数：10

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