标题： 利用二阶磁各向异性增强异常霍尔效应磁传感器的灵敏度 显示英文标题

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

摘要： 研究了异常霍尔效应（AHE）磁传感器的灵敏度、电压噪声功率谱及其探测率，以探讨其传感性能。 特别关注二阶各向异性常数K2对传感性能的影响。 结果表明，通过调节K2值接近面内磁化状态和锥形磁化状态之间的边界，可以显著提高灵敏度。 此外还发现，只要薄膜处于面内磁化状态，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见解。 显示英文摘要

摘要： 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.