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High In-Plane Magnetic Anisotropy and Microwave Frequency Performance of Soft Magnetic (Fe _{50} Co _{50} ) _{1-{\rm x}} (Al _{2} O _{3} ) _{\rm x} Films Prepared by Modified Composition Gradient Sputtering

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9 Author(s)
Shandong Li ; Dept. of Phys., Fujian Normal Univ., Fuzhou, China ; Ming Liu ; Lou, J. ; Xing, X.
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The fabrication and high-frequency ferromagnetic performances of (Fe50Co50)1-x(Al2O3)x soft magnetic films (SMFs) were investigated. It is revealed that the modified composition gradient sputtering method dramatically improves the high-frequency soft magnetic properties of the as-prepared films. This method gives rise to a linearly increased distribution of compositions and residual stress. As a result, comparing with the samples prepared by conventional composition gradient sputtering (CGS) method, a very high and uniform ferromagnetic resonance frequency in excess of 5 GHz, high uniaxial magnetic anisotropic field, and low magnetic loss were obtained, which are particularly in favor of the integration between magnetic films and radio-frequency (RF) components.

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Magnetics, IEEE Transactions on  (Volume:47 ,  Issue: 10 )