Department of Magnetism and Magnetic Nanomaterials, Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Ekaterinburg, Russia.
Laboratory of Advanced Magnetic Materials, Institute of Metal Physics UD RAS, 620108 Ekaterinburg, Russia.
Sensors (Basel). 2021 Oct 10;21(20):6728. doi: 10.3390/s21206728.
Soft magnetic materials are widely requested in electronic and biomedical applications. Co-based amorphous ribbons are materials which combine high value of the magnetoimpedance effect (MI), high sensitivity with respect to the applied magnetic field, good corrosion stability in aggressive environments, and reasonably low price. Functional properties of ribbon-based sensitive elements can be modified by deposition of additional magnetic and non-ferromagnetic layers with required conductivity. Such layers can play different roles. In the case of magnetic biosensors for magnetic label detection, they can provide the best conditions for self-assembling processes in biological experiments. In this work, magnetic properties and MI effect were studied for the cases of rapidly quenched CoFeCrSiB amorphous ribbons and magnetic FeNi/CoFeCrSiB/FeNi composites obtained by deposition of FeNi 1 μm thick films onto both sides of the ribbons by magnetron sputtering technique. Their comparative analysis was used for finite element computer simulations of MI responses with different types of magnetic and conductive coatings. The obtained results can be useful for the design of MI sensor development, including MI biosensors for magnetic label detection.
软磁材料在电子和生物医学应用中需求量很大。基于钴的非晶态带材是一种材料，它结合了高磁阻抗效应（MI）值、对施加磁场的高灵敏度、在腐蚀性环境中的良好耐腐蚀性以及相对较低的价格。基于带材的敏感元件的功能特性可以通过沉积具有所需电导率的附加磁性和非磁性层来进行修改。这些层可以发挥不同的作用。在用于检测磁性标签的磁性生物传感器的情况下，它们可以为生物实验中的自组装过程提供最佳条件。在这项工作中，通过磁控溅射技术在带材的两侧沉积 1 μm 厚的 FeNi 薄膜，研究了快速淬火 CoFeCrSiB 非晶态带材和磁性 FeNi/CoFeCrSiB/FeNi 复合材料的磁性能和 MI 效应。对不同类型的磁性和导电涂层的 MI 响应进行了有限元计算机模拟，并对其进行了比较分析。这些结果可用于 MI 传感器开发的设计，包括用于磁性标签检测的 MI 生物传感器。
