DocumentCode :
3602432
Title :
Nanogranular CoFe-Yttrium-Doped Zirconia Films for Noise Suppressor
Author :
Guijie Hao ; Dainan Zhang ; Lichuan Jin ; Huaiwu Zhang ; Xiaoli Tang
Author_Institution :
State Key Lab. of Electron. Thin Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Volume :
51
Issue :
11
fYear :
2015
Firstpage :
1
Lastpage :
4
Abstract :
Magnetic nanogranular CoFe-yttrium-doped zirconia (CoFe-YSZ) films have been deposited by radio-frequency magnetron cosputtering. By simply adjusting the thickness of films, the imaginary permeability spectrum of CoFe-YSZ films changed from a resonance-type permeability spectra to a relaxation-type permeability spectra. Based on this phenomenon, nanogranular CoFe-YSZ films with various thicknesses were deposited. The characteristics of the electromagnetic noise suppression have been evaluated using an integrated coplanar waveguide transmission line. The CoFe-YSZ film of 821 nm shows a very wide resonance peak with the full-width at half-maximum of 2.8 GHz. The absorption attenuation amplitude reaches -8.3 dB at the resonance frequency, which is better than -6.2 dB for the frequency above 3.5 GHz. The physical origin of these influences was suggested to be the structure and composition changes of the films. In addition, the variations of ferromagnetic resonance peak broadness of the imaginary part and damping factor were also discussed as functions of film thickness.
Keywords :
cobalt alloys; ferromagnetic resonance; granular materials; iron alloys; magnetic noise; magnetic permeability; magnetic thin films; nanofabrication; nanomagnetics; nanostructured materials; sputter deposition; yttrium compounds; zirconium compounds; CoFe-Y2O3-ZrO2; absorption attenuation amplitude; damping factor; electromagnetic noise suppression characteristics; ferromagnetic resonance peak; film composition; film thickness; frequency 2.8 GHz; imaginary permeability spectrum; integrated coplanar waveguide transmission line; magnetic nanogranular CoFe-yttrium-doped zirconia films; radiofrequency magnetron cosputtering; relaxation-type permeability spectra; resonance frequency; resonance-type permeability spectra; size 821 nm; Coplanar waveguides; Magnetic films; Magnetic resonance imaging; Permeability; Perpendicular magnetic anisotropy; Coplanar waveguide (CPW); electromagnetic interference; electromagnetic interference (EMI); ferromagnetic resonance (FMR); nanogranular films;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2015.2435892
Filename :
7111348
Link To Document :
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