Pal Sayani, Aon Soumik, Manna Subhadip, Mitra Chiranjib
Indian Institute of Science Education and Research Kolkata, Kolkata, West Bengal, India.
Rev Sci Instrum. 2022 Aug 1;93(8):083909. doi: 10.1063/5.0100917.
A coplanar waveguide shorted in one end is proposed, designed, and implemented successfully to measure the properties of magnetic thin films as a part of the vector network analyzer ferromagnetic resonance (FMR) spectroscopy setup. Its simple structure, potential applications, and easy installation inside the cryostat chamber made it advantageous especially for low-temperature measurements. It provides a wide band of frequencies in the gigahertz range essential for FMR measurements. Our spectroscopy setup with a short-circuited coplanar waveguide has been used to extract the Gilbert damping coefficient and effective magnetization values for standard ferromagnetic thin films, such as Permalloy (Py) and Cobalt (Co). The thickness and temperature-dependent studies of those magnetic parameters have also been done here for the afore-mentioned magnetic samples.
提出并成功设计和实现了一种一端短路的共面波导，作为矢量网络分析仪铁磁共振（FMR）光谱装置的一部分用于测量磁性薄膜的特性。其结构简单、具有潜在应用价值且易于安装在低温恒温器腔内，这使其在低温测量方面具有优势。它在千兆赫兹范围内提供了FMR测量所需的宽带频率。我们带有短路共面波导的光谱装置已用于提取标准铁磁薄膜（如坡莫合金（Py）和钴（Co））的吉尔伯特阻尼系数和有效磁化强度值。在此还对上述磁性样品进行了这些磁性参数随厚度和温度变化的研究。
