Work

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

Year: 2025

Type: article

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.

Source: Applied Physics Letters

DOI: 10.1063/5.0282441

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

Institutions: National University of Singapore, Xi'an Jiaotong University

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Agency for Science, Technology and Research, National University of Singapore

Award: G4232205453