High-Frequency Ferromagnetic Properties of Nanocrystalline (Co₂FeSi)_1-x(Al₂O₃)_x Heusler Alloy Films with Uniaxial Magnetic Anisotropy

Abstract:

A series of (Co₂FeSi)_1-x(Al₂O₃)_x Heusler alloy films with various Al₂O₃-doping were prepared by an oblique sputtering method. It is exciting that the as-deposited films exhibit a very high in-plane uniaxial magnetic anisotropy (UMA) field up to 360 Oe and low coercivity of 12 Oe. Consequently, a very high self-bias ferromagnetic resonance frequency in excess of 5.02 GHz was obtained in as-deposited Co₂FeSi films without any annealing. The good microwave ferromagnetic performances and the integrated circuits compatible fabrication process of Co₂FeSi films make possible application in RF/microwave devices.

• Periodical: Materials Science Forum (Volume 787)
• Pages: 342-346
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.787.342
• Online since: April 2014
• Authors: Xiao Qin Cao*, Shan Dong Li, Zhi Yi Cai, Hong Lei Du, Qian Xue, Xiao Yang Gao, Shi Ming Xie
• Keywords: Ferromagnetic Resonance Frequency, Heusler Alloy, High-Frequency Ferromagnetic Properties, Oblique Sputtering

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