Reconfigurable Magnetoresistive Sensor Based on Magnetoelectric Coupling,Advanced Electronic Materials

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Reconfigurable Magnetoresistive Sensor Based on Magnetoelectric Coupling
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2020-01-30 , DOI: 10.1002/aelm.201901061
Wei Su ₁ , Zhiguang Wang ₁ , Yicheng Chen ₁ , Xinger Zhao ₁ , Chaojie Hu ₁ , Tao Wen ₁ , Zhongqiang Hu ₁ , Jingen Wu ₁ , Ziyao Zhou ₁ , Ming Liu ₁

Affiliation

Measurement of magnetic signal from an arbitrary direction is of vital importance for applications in magnetic navigation, space science, indoor positioning, and magnetic gesture recognition. However, magnetoresistive sensors, as vector magnetometers, are only suitable for detection of magnetic signals along the magnetic hard axis. Magnetoelectric coupling is introduced to control the magnetic anisotropy of a magnetoresistive pattern, realizing a 90° rotation of the magnetic hard axis and thus the sensing direction of the tunable sensor. The sensitivity along the initial magnetic easy axis can be enhanced 12.7‐fold while that along the initial hard axis can be depressed to be only 4.7% of the original value through magnetic anisotropy engineering. The tailorable directional sensitivity of the electric‐field reconfigurable sensor speaks to the strong potential of this system for practical applications requiring testing of localized magnetic fields, for example, magnetic diagnosis or biomagnetic characterization.

中文翻译：

基于磁电耦合的可重构磁阻传感器

从任意方向测量磁信号对于磁导航，空间科学，室内定位和磁手势识别中的应用至关重要。然而，作为矢量磁力计的磁阻传感器仅适用于检测沿磁硬轴的磁信号。引入磁电耦合以控制磁阻图案的磁各向异性，从而实现磁硬轴旋转90°，从而实现可调传感器的感测方向。通过磁各向异性工程，沿初始磁易轴的灵敏度可以提高12.7倍，而沿初始硬轴的灵敏度可以降低到仅为原始值的4.7％。

更新日期：2020-03-09

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