Shielding of the electromagnetic field of a coplanar waveguide by a metal film: Implications for broadband ferromagnetic resonance measurements

被引：41
作者：
Bailleul, Matthieu [1 ]
机构：
[1] Univ Strasbourg, CNRS, Inst Phys & Chim Mat Strasbourg, UMR 7504, F-67034 Strasbourg 2, France
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 19期
关键词：
THIN-FILMS;
D O I：
10.1063/1.4829367
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We show that the propagation of microwave fields along a planar transmission line is strongly modified when a conducting film is brought close to it. The effect is attributed to the shielding of the electrical and/or magnetic microwave fields which is shown to occur over a wide range of parameters (microwave frequency, film square resistance, transverse dimensions of the waveguide). This is illustrated by finite-element electromagnetic simulations and interpreted using a distributed impedance model. We discuss the implications of this phenomenon for broadband measurements of ferromagnetic resonance realized by placing a ferromagnetic metal film above a coplanar waveguide. (C) 2013 AIP Publishing LLC.
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页数：4
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