A New Shorted Microstrip Method to Determine the Complex Permeability of Thin Films

Author

Wu, Yunqiu ; Tang, Zongxi ; Xu, Yuehang ; Zhang, Biao ; He, Xi

Author_Institution

Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

46

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

886

Lastpage

888

Abstract

A new method is proposed to determine the complex permeability of ferromagnetic thin films from 100 MHz to 15 GHz. In this method, shorted microstrip transmission-line perturbation combined with the conformal mapping method is used. In contrast with previous methods to measure the thin films deposited on rigid substrates, this method neither requires any reference sample for calibration, nor requires the additional measurement to determine saturation magnetization. To assess the validity of this new method, three samples with different thicknesses are measured; comparisons are performed between the theoretical and experimental results, and the repeatability of this method is studied by measuring the samples five times. The results show that the complex permeability of ferromagnetic thin films can be measured within 10% errors.

Keywords

ferromagnetic materials; magnetic permeability; magnetic permeability measurement; magnetic thin films; magnetisation; microstrip lines; microwave measurement; complex permeability; conformal mapping method; ferromagnetic thin films; frequency 100 MHz to 15 GHz; saturation magnetization; shorted microstrip transmission-line perturbation; Complex permeability; microwave measurement; thin film;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2030886

Filename

5232843