Tunable Linear Dependence of Giant Magnetoimpedance Response of Microwires Annealed under Fluid Oil for Sensor Applications,Physica Status Solidi (A) - Applications and Materials Science

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Tunable Linear Dependence of Giant Magnetoimpedance Response of Microwires Annealed under Fluid Oil for Sensor Applications
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2021-07-01 , DOI: 10.1002/pssa.202100154
Dongming Chen ₁ , Yunfei Wang ₂ , Rui Su ₁ , Hongxian Shen ₃ , Jingshun Liu ₄ , Lunyong Zhang ₃ , Sida Jiang ₅ , Jianfei Sun ₃

Affiliation

Herein, fluid oil joule annealing modulation (FOJA) for improving the giant magnetoimpedance (GMI) property of CoFe-based microwires with the microstructure is adopted, and magnetic domain structure is systematically investigated. Compared with general joule annealing (JA) method, a much larger DC current can be used. The maximum GMI value is 440.8% in the 250 mA FOJA-treated sample and the maximum monotonically increasing magnetic field is 12 Oe in 400 mA FOJA-treated sample. In the 100–400 mA FOJA-treated samples, there is a nearly linear increase and decrease relationship between GMI and the magnetic field. In addition, the FOJA method can control the radial stress release and helical magnetic domains of the microwire by changing the Joule heat transfer and the circumferential magnetic field and then tune the GMI performance of the microwires. The remarkable features, including a continuous and clear linear-sensitive response field H_ex of 0–95 Oe, quick response sensitivity, large GMI ratio, and excellent tunability, make the FOJA-tailored microwires promising candidate material for miniaturized GMI sensors.

中文翻译：

用于传感器应用的在流体油下退火的微丝的巨磁阻抗响应的可调谐线性相关性

在此，采用流体油焦耳退火调制（FOJA）来改善具有微观结构的 CoFe 基微线的巨磁阻抗（GMI）性能，并系统地研究了磁畴结构。与一般焦耳退火 (JA) 方法相比，可以使用大得多的直流电流。在 250 mA FOJA 处理的样品中，最大 GMI 值为 440.8%，在 400 mA FOJA 处理的样品中，最大单调增加磁场为 12 Oe。在 100-400 mA FOJA 处理的样品中，GMI 与磁场之间存在近乎线性的增减关系。此外，FOJA 方法可以通过改变焦耳热传递和圆周磁场来控制微丝的径向应力释放和螺旋磁畴，然后调整微丝的 GMI 性能。0-95 Oe 的H _ex、快速响应灵敏度、大 GMI 比和出色的可调性，使 FOJA 定制的微线成为微型 GMI 传感器的候选材料。

更新日期：2021-07-01

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