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Thickness-dependent magnetic property of FeNi thin film grown on flexible graphene substrate

CHINESE PHYSICS B 2025年第2期34卷 448-452页

作者： Zhan, Suixin Yuan, Shaokang Bai, Yuming Liu, Fu Zhang, Bohan Han, Weijia Wang, Tao Wang, Shengxiang Zhou, Cai Wuhan Text Univ Key Lab New Text Mat & Adv Proc Technol Wuhan 430200 Peoples R China Wuhan Text Univ Sch Math & Phys Sci Wuhan 430200 Peoples R China Huazhong Univ Sci & Technol Sch Integrated Circuits Wuhan 430074 Peoples R China Lanzhou Univ Key Lab Magnetism & Magnet Mat Minist Educ Lanzhou 730000 Peoples R China

Electronics over flexible substrates offer advantages of flexibility, portability and low cost, and promising applications in the areas of energy, information, defense science and medical service. In recent years, tremendous progress has been witnessed in the development of flexible wearable devices that can be potentially massively deployed. Of particular interest are intelligent wearable devices, such as sensors and storage cells, which can be integrated by flexible magnetoelectronic devices based on magnetic thin films. To examine this further, the magnetic properties of FeNi thin films with different thicknesses grown on flexible graphene substrate are investigated at room temperature. The coercivity increases with increasing thicknesses of FeNi thin film, which can be attributed to the increase of grain size and decrease of surface roughness. Moreover, the thickness modulated magnetic property shows a magnetic anisotropy shift increase with varying thicknesses of FeNi thin film by using measurements based on ferromagnetic resonance, which further enhances the resonance frequency. In addition, the resonance peak is quite stable after bending it for ten cycles. The result is promising for the future design of flexible magnetoelectronic devices.

关键词： resonance frequency FeNi thin film flexible graphene substrate magnetic property 75.70.-I 76.50.+g 32.30.dx

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