Sensitivity enhancement of an anomalous Hall effect magnetic sensor by means of second-order magnetic anisotropy

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-04-22 DOI:10.1063/5.0260358

H. Arai, H. Imamura

引用次数: 0

Abstract

The sensing performance of anomalous Hall effect (AHE) magnetic sensors is investigated in terms of their sensitivity, the power spectrum of their voltage noise, and their detectivity. Special attention is paid to the effect of the second-order anisotropy constant, K2, on the sensing performance. It is found that the sensitivity is strongly enhanced by tuning the value of K2 close to the boundary between the in-plane magnetized state and the conically magnetized state. It is also found that the detectivity is almost independent of K2 as long as the film is in-plane magnetized. These results provide fundamental insights into the design of high-performance AHE sensors.

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利用二阶磁各向异性增强反常霍尔效应磁传感器的灵敏度

从灵敏度、电压噪声功率谱和检出率等方面研究了异常霍尔效应（AHE）磁传感器的传感性能。特别注意了二阶各向异性常数K2对传感性能的影响。将K2的值调到接近面内磁化态和圆锥磁化态的边界处，可以大大提高灵敏度。还发现，只要薄膜是面内磁化的，探测率几乎与K2无关。这些结果为高性能AHE传感器的设计提供了基本的见解。

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.