Dual-mode operation of ring-shaped spin Hall magnetoresistance sensor with biaxial sensing capability

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-09-26 DOI:10.1063/5.0282441

Jiayi Xu, Yuxin Si, Jiaqi Wang, Tingxuan Zhang, Zhenfei Hou, Yihong Wu

引用次数: 0

Abstract

We present a spin Hall magnetoresistance sensor based on a NiFe/Pt multiring bridge structure, which exhibits high sensitivity and good linearity in two perpendicular directions within the sensor plane. Under DC excitation, it responds linearly to a magnetic field perpendicular to the current direction, whereas AC excitation enables a linear response with near-zero offset to a magnetic field aligned with the current direction, driven by the spin–orbit torque effect. Moreover, the AC excitation effectively mitigates low-frequency 1/f noise down to sub-μV/Hz at 1 Hz. Systematic investigations have been performed to optimize the NiFe thickness while keeping the Pt thickness at 2 nm. The biaxial sensing capability offers a promising approach for multidimensional magnetic field detection in advanced sensing applications.

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具有双轴感应能力的环形自旋霍尔磁阻传感器的双模工作

我们提出了一种基于NiFe/Pt多环桥结构的自旋霍尔磁阻传感器，该传感器在传感器平面内两个垂直方向上具有高灵敏度和良好的线性。在直流励磁下，它对垂直于电流方向的磁场产生线性响应，而在自旋轨道转矩效应的驱动下，交流励磁对与电流方向对齐的磁场产生接近零偏移的线性响应。此外，交流励磁有效地降低了低频1/f噪声，在1hz时降至亚μ v /Hz。在保持Pt厚度为2 nm的情况下，进行了系统的研究以优化NiFe厚度。双轴传感能力为先进传感应用中的多维磁场检测提供了一种很有前途的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.