Fabrication and high frequency magnetic characterization of FeCoAl ternary thin films

✍ Scribed by Peng, Yung-Wang ;Wu, Fan-Bean ;Li, Shandong ;Kuo, Cheng-Lun ;Duh, Jenq-Gong

• Book ID: 105364729
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 382 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200777344

✦ Synopsis

Abstract

Integration of ferromagnetic materials with electronic components represents a key solution to the enhancement of high frequency characteristics for recent miniaturized communication devices. In this study, Al element was introduced into FeCo binary alloy to form a ternary FeCoAl magnetic thin film by co‐sputtering technique followed by annealing in the presence of an external magnetic field. X‐ray diffraction results revealed that the FeCoAl films exhibited a solid solution microstructure of FeCo matrix with Al as the solute element. The saturation magnetization (M~s~) of FeCoAl thin film still maintained a high value around 1780 emu/cm^3^. It was found that the FeCoAl system possessed a high permeability around 1000 and an uni‐axial anisotropic field (H~k~) of 50 Oe. In addition, with the incorporation of Al element, the resonance frequency of the FeCoAl film reached 2.1 GHz. Hence, it is suggested that the FeCoAl magnetic thin film is a potential candidate for high frequency devices operated in GHz bands. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)