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具有适用于各种磁传感器应用的独特磁性能组合的磁性微丝。

Magnetic Microwires with Unique Combination of Magnetic Properties Suitable for Various Magnetic Sensor Applications.

作者信息

Corte-Leon Paula, Zhukova Valentina, Chizhik Alexandr, Blanco Juan Maria, Ipatov Mihail, Gonzalez-Legarreta Lorena, Zhukov Arcady

机构信息

Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain.

Departamento de Física Aplicada, EIG, Basque Country University, Universidad del País Vasco/Euskal Herriko Unibersitatea, UPV/EHU, 20018 San Sebastian, Spain.

出版信息

Sensors (Basel). 2020 Dec 16;20(24):7203. doi: 10.3390/s20247203.

DOI:10.3390/s20247203
PMID:33339238
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7767316/
Abstract

There is a pressing demand to improve the performance of cost-effective soft magnetic materials for use in high performance sensors and devices. Giant Magneto-impedance effect (GMI), or fast single domain wall (DW) propagation can be observed in properly processed magnetic microwires. In this paper we have identified the routes to obtain microwires with unique combination of magnetic properties allowing observation of fast and single DW propagation and GMI effect in the same microwire. By modifying the annealing conditions, we have found the appropriate regimes allowing achievement of the highest GMI ratio and the fastest DW dynamics. The observed experimental results are discussed considering the radial distribution of magnetic anisotropy and the correlation of GMI effect, and DW dynamics with bulk and surface magnetization processes. Studies of both Fe- and Co-rich microwires, using the magneto-optical Kerr effect, MOKE, provide information on the magnetic structure in the outer shell of microwires. We have demonstrated the existence of the spiral helical structure in both studied microwires. At the same time, torsion mechanical stresses induce helical bistability in the same microwires, which allow us to consider these microwires as materials suitable for sensors based on the large Barkhausen jump.

摘要

迫切需要提高用于高性能传感器和设备的具有成本效益的软磁材料的性能。在经过适当处理的磁性微丝中可以观察到巨磁阻抗效应（GMI）或快速单畴壁（DW）传播。在本文中，我们确定了获得具有独特磁性能组合的微丝的途径，从而能够在同一微丝中观察到快速且单DW传播以及GMI效应。通过改变退火条件，我们找到了能够实现最高GMI比率和最快DW动力学的合适状态。结合磁各向异性的径向分布以及GMI效应、DW动力学与体磁化和表面磁化过程的相关性，对观察到的实验结果进行了讨论。利用磁光克尔效应（MOKE）对富铁和富钴微丝进行的研究提供了有关微丝外壳磁结构的信息。我们已经证明了在两种研究的微丝中都存在螺旋结构。同时，扭转机械应力在同一微丝中诱导螺旋双稳性，这使我们能够将这些微丝视为适用于基于大巴克豪森跳跃的传感器的材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/c78c4f379191/sensors-20-07203-g018.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/55c995811828/sensors-20-07203-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/10ab905ab6a0/sensors-20-07203-g016.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/604657a4dee1/sensors-20-07203-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/1938f120e654/sensors-20-07203-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/5679e4ab081d/sensors-20-07203-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/c8697674575b/sensors-20-07203-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/55c995811828/sensors-20-07203-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/49bbd928dc8a/sensors-20-07203-g015.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5461/7767316/c78c4f379191/sensors-20-07203-g018.jpg

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