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Tuning the ferromagnetic resonance frequency of soft magnetic film by patterned permalloy micro-stripes with stripe-domain.

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Title: Tuning the ferromagnetic resonance frequency of soft magnetic film by patterned permalloy micro-stripes with stripe-domain.
Authors: Pan, Lining1, Xie, Hongkang1, Cheng, Xiaohong1, Zhao, Chenbo1, Feng, Hongmei1, Cao, Derang2, Wang, Jianbo1,3, Liu, Qingfang1 liuqf@lzu.edu.cn
Source: Journal of Magnetism & Magnetic Materials. Jul2018, Vol. 457, p46-51. 6p.
Subjects: Composite materials, Ferromagnetic materials, Permanent magnets, Superconductivity, Magnetic sensors
Abstract: Periodic micro-stripes arrays with stripe domains structures upon continuous permalloy (Py) film were fabricated by sputtering, photolithography and ion beam etching technology. These samples display in-plane magnetic anisotropy, and stripe domains structure is observed by the magnetic force microscopy (MFM) in the area of the micro-stripes. The periodic micro-stripes show an effective impact on static and dynamic magnetic properties of Py continuous film. In the case of dynamic magnetic properties, the resonance frequency f r of these samples can be tuned by periodic micro-stripes arrays. Compared to continuous film with resonance frequency f r of 0.64 GHz, the f r of composite structures can be tuned by the separation gap of periodic micro-stripes arrays from 0.8 GHz to 2.3 GHz at zero-field. At the same time, the f r could be also tuned by rotating the samples within the plane. This attributes to the competition of shape anisotropy induced by micro-stripes and the dynamic anisotropy originating by stripe domains structure. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Periodic micro-stripes arrays with stripe domains structures upon continuous permalloy (Py) film were fabricated by sputtering, photolithography and ion beam etching technology. These samples display in-plane magnetic anisotropy, and stripe domains structure is observed by the magnetic force microscopy (MFM) in the area of the micro-stripes. The periodic micro-stripes show an effective impact on static and dynamic magnetic properties of Py continuous film. In the case of dynamic magnetic properties, the resonance frequency f r of these samples can be tuned by periodic micro-stripes arrays. Compared to continuous film with resonance frequency f r of 0.64 GHz, the f r of composite structures can be tuned by the separation gap of periodic micro-stripes arrays from 0.8 GHz to 2.3 GHz at zero-field. At the same time, the f r could be also tuned by rotating the samples within the plane. This attributes to the competition of shape anisotropy induced by micro-stripes and the dynamic anisotropy originating by stripe domains structure. [ABSTRACT FROM AUTHOR]
ISSN:03048853
DOI:10.1016/j.jmmm.2018.02.060