Effect of annealing and roughness on the magnetic-optical, adhesive, nano-mechanical, and electrical properties of Co60Fe20Dy20 films

Q3 Physics and Astronomy
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Abstract

The structural, magnetic, optical, and adhesion properties of Cobalt-Iron-Dysprosium (CoFeDy) films were investigated in this study. Glass substrates were coated with a Co60Fe20Dy20 alloy via sputtering, with a thickness ranging from 10 nm to 50 nm. Subsequently, the films underwent annealing at temperatures of 100 °C, 200 °C, and 300 °C for one hour. X-ray diffraction (XRD) analysis confirmed the amorphous nature of the deposited CoFeDy films under four distinct conditions. Notably, a thickness-dependent increase in low-frequency alternate-current magnetic susceptibility (χac) was observed. After annealing at 300 °C, CoFeDy films exhibited the highest χac compared to other temperatures. Surface roughness exhibited a decreasing trend with rising annealing temperature, as observed through atomic force microscopy (AFM) experiments. The maximum surface energy of CoFeDy films was achieved at a thickness of 50 nm following annealing at 300 °C. Higher surface energy was indicative of stronger adhesion efficiency. Furthermore, lower resistance and sheet resistance values were obtained through annealing at higher temperatures, suggesting that increasing thickness and reducing electron transport barriers enhanced electron conductivity. As film thickness increased, transmittance decreased due to the thickness effect, suppressing the photon signal. Consequently, rougher surfaces were associated with improved performance in magnetism, electrical adhesion, and optics, attributed to reduced domain pinning, enhanced carrier conductivity, and minimized light scattering.

Abstract Image

退火和粗糙度对 Co60Fe20Dy20 薄膜的磁光、粘合、纳米机械和电气性能的影响
本研究调查了钴铁镝(CoFeDy)薄膜的结构、磁性、光学和附着特性。通过溅射法在玻璃基底上镀上 Co60Fe20Dy20 合金,厚度为 10 纳米至 50 纳米。随后,薄膜分别在 100 ℃、200 ℃ 和 300 ℃ 的温度下退火一小时。X 射线衍射(XRD)分析证实了在四种不同条件下沉积的 CoFeDy 薄膜的非晶体性质。值得注意的是,低频交变电流磁感应强度(χac)的增加与厚度有关。在 300 °C 退火后,与其他温度相比,CoFeDy 薄膜表现出最高的 χac。通过原子力显微镜(AFM)实验观察到,随着退火温度的升高,表面粗糙度呈下降趋势。CoFeDy 薄膜在 300 °C 退火后,厚度为 50 nm 时表面能达到最大。更高的表面能表明更强的粘附效率。此外,在较高温度下退火可获得较低的电阻值和薄层电阻值,这表明增加厚度和减少电子传输障碍可增强电子导电性。随着薄膜厚度的增加,厚度效应导致透射率下降,从而抑制了光子信号。因此,粗糙的表面与磁性、电附着力和光学性能的改善有关,这归因于畴钉的减少、载流子传导性的增强和光散射的最小化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Results in Optics
Results in Optics Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
2.50
自引率
0.00%
发文量
115
审稿时长
71 days
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