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Title: Magnetic anisotropy and resonance frequency of patterned soft magnetic strips
Authors: Chen, X.
Ma, Y.G. 
Ong, C.K. 
Issue Date: 2008
Citation: Chen, X., Ma, Y.G., Ong, C.K. (2008). Magnetic anisotropy and resonance frequency of patterned soft magnetic strips. Journal of Applied Physics 104 (1) : -. ScholarBank@NUS Repository.
Abstract: FeTaN thin films of 100 nm with in-plane uniaxial anisotropy were fabricated by rf magnetron sputtering and patterned into strips with width varied from 30 to 500 μm along both the easy and hard magnetization axes of the unpatterned films. The values of effective magnetic anisotropy of the patterned films increase as the strip widths decrease. The ferromagnetic resonance frequency showed a corresponding increment from 1.38 to 2.58 GHz as the strip width varied. It indicates that this method is effective to tune the ferromagnetic resonance frequency of magnetic thin films. The resultant permeability spectra were understood according to the well-known Kittel formula where an averaged shape anisotropy arisen from the patterning was taken into account for the strips patterned along the easy axis. For the strips patterned along the hard axis, the increase in resonance frequency in narrower strips is attributed to the strengthened internal domain pinning effect predicted from the domain patterns numerically calculated. © 2008 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.2953065
Appears in Collections:Staff Publications

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