Investigation of FeCo-Ti-O nanogranular films with tunable permeability spectrum
Investigation of FeCo-Ti-O nanogranular films with tunable permeability spectrum
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具有可调磁导率光谱的 FeCo-Ti-O 纳米颗粒薄膜的研究
DOI：
10.1016/j.jallcom.2016.01.165
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发表时间：
2016-05-15
影响因子：
6.2
通讯作者：
Bai, Feiming
中科院分区：
文献类型：
--
作者：
Wang, Yicheng;Wang, Luo;Bai, Feiming
采用共溅射法在Si衬底上制备了一系列不同Ti含量的FeCo-Ti-O纳米颗粒软磁薄膜。通过调节Ti含量，FeCo-Ti-O薄膜的导磁谱虚部从单一峰变为双峰，再变为单一峰。频率转换铁磁共振（FMR）分析表明，双FMR峰可以在所有三个薄膜中发现，这是由于本地各向异性或两个磁相嵌入在非晶TiOx矩阵。结构和温度相关的电阻率分析支持这样的三个组件的微观结构。重叠的双FMR峰提供了超过3GHz的宽吸收频带，这对于电磁干扰抑制器的设计至关重要。(c)© 2016 Elsevier B. V.版权所有。
A series of soft magnetic nanogranular FeCo-Ti-O films with different Ti contents were fabricated on Si substrates by co-sputtering. By adjusting the Ti content, it appears that the imaginary part of the permeability spectra of FeCo-Ti-O films changes from a single peak to double peaks then to a single peak. Frequency conversion ferromagnetic resonance (FMR) analysis evidences that double FMR peaks can be found in all three films, which were attributed to local anisotropy or two magnetic phases embedded in amorphous TiOx matrix. Structural and temperature dependent resistivity analysis support such three component microstructure. The overlapping double FMR peaks provide a wide absorption frequency band over 3 GHz, which is critical for the design of electromagnetic interference suppressor. (c) 2016 Elsevier B.V. All rights reserved.