Ultrasensitive Multifunctional Magnetoresistive Strain Sensor Based on Hair‐Like Magnetization‐Induced Pillar Forests,Advanced Electronic Materials

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Ultrasensitive Multifunctional Magnetoresistive Strain Sensor Based on Hair‐Like Magnetization‐Induced Pillar Forests
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2019-10-11 , DOI: 10.1002/aelm.201900653
Li Ding ₁ , Lei Pei ₁ , Shouhu Xuan ₁ , Xiwen Fan ₁ , Xufeng Cao ₁ , Yu Wang ₁ , Xinglong Gong ₁

Affiliation

An ultrasensitive multifunctional sensor which integrates tactile sensing and magnetism sensing together in one device is presented. The sensor, dubbed L‐MPF, consists of two interlocking hair‐like magnetization‐induced pillar forests, which are self‐formed under a magnetic field and a loading pressure. An L‐MPF endows intelligent electronics with magnetic field reception, which is the sense of bacteria, birds, and whales, rather than human beings. It is found that the L‐MPF precisely detects the magnitude and the loading path of the dynamic load, including pressure, shear, and magnetic field, with fast response, high reversibility, excellent sensitivity, and high stability. The sensitivity coefficient can reach 1965, 1.6, and 240% T⁻¹ under 50–60% compressive strain, 0–3.4° shear strain, and 21–170 mT magnetic field. Additionally, the strain sensitivity coefficient can be set by the external magnetic field, which affords a potential approach to realize different sensing requirements in various circumstances. For a detailed insight into the sensing element's behavior, the magnetic–mechanic–electric coupling response is also described by simplified model simulation and theoretical analysis. Furthermore, a 4 × 4 L‐MPF array exhibits contactless gesture sensing, which provides a new way for next‐generation human–electronics interface devices and artificial electronic skin.

中文翻译：

基于毛发磁化支柱林的超灵敏多功能磁阻应变传感器

提出了一种超灵敏的多功能传感器，它将触觉感测和磁性感测集成在一个设备中。该传感器称为L‐MPF，由两个互锁的头发状磁化感应的柱状林组成，它们在磁场和加载压力作用下自行形成。L‐MPF使智能电子设备具有磁场接收能力，这就是细菌，鸟类和鲸鱼而不是人类的感觉。发现L‐MPF具有快速响应，高可逆性，出色的灵敏度和高稳定性，可精确检测动态负载的大小和负载路径，包括压力，剪切力和磁场。灵敏度系数可以达到1965、1.6和240％T ^-1承受50–60％的压缩应变，0–3.4°剪切应变和21–170 mT磁场。另外，应变灵敏度系数可以由外部磁场设置，这提供了一种在各种情况下实现不同感测要求的潜在方法。为了更深入地了解传感元件的行为，还通过简化的模型仿真和理论分析来描述磁-机-电耦合响应。此外，4×4 L‐MPF阵列具有非接触式手势感应功能，为下一代人电子接口设备和人造电子皮肤提供了一种新方法。

更新日期：2020-01-13

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