双层异常霍尔效应传感器,用于提高磁场检测的精度和范围
Sitong An1, Lvkang Shen1, Tianyu Liu1
1School of Microelectronics, Xi'an Jiaotong University, Xi'an 710049, China.
Nanomaterials (Basel, Switzerland)
|April 11, 2025
概括
这项研究介绍了一种基于NiCo2O4的新型传感器,使用表轴应变来增强磁场传感精度和范围. 该设备实现了超高灵敏度的精确测量和各种应用的广泛范围.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 磁场传感器在各种技术应用中至关重要.
- 提高传感器的灵敏度和测量范围仍然是一个关键挑战.
- 异常霍尔效应 (AHE) 传感器为小型化和高性能提供了潜力.
研究的目的:
- 开发一种基于NiCo2O4的新型异常霍尔效应传感器,其精度提高,测量范围扩大.
- 为了研究表轴应变对磁性和传感器性能的影响.
- 设计一个多范围磁场传感器,用于多功能应用.
主要方法:
- 制造一个NiCo2O4/MgAl2O4/NiCo2O4/MgAl2O4异构结构.
- 使用MgAl2O4覆盖层引入表轴应变以调节磁性异质性.
- 设计一个双层的Hall bar结构,具有不同的NiCo2O4层厚度.
主要成果:
- 在±0.1mT范围内达到10,000V/(AT) 的超高灵敏度.
- 在±5mT范围内显示出60V/(AT) 的竞争灵敏度.
- 通过减少顶部NiCo2O4层厚度,实现了±1000mT的超宽测量范围.
结论:
- 基于NiCo2O4的AHE传感器显示了增强磁传感的巨大潜力.
- 应变工程提供了一种有效的方法来调整传感器特征,如灵敏度和范围.
- 开发的紧型多范围传感器对先进的磁传感技术充满希望.
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