Dual-mode operation of ring-shaped spin Hall magnetoresistance sensor with biaxial sensing capability
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.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (6)
Jiayi Xu
Chemical Sciences and Engineering Division
Yuxin Si
Department of Electrical and Computer Engineering, National University of Singapore 1 , 4 Engineering Drive 3, 117583
Jiaqi Wang
Tingxuan Zhang
Department of Electrical and Computer Engineering, National University of Singapore 1 , 4 Engineering Drive 3, 117583
Zhenfei Hou
Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University 3 , Xi'an 71004,
Yihong Wu
College of Chemistry and Chemical Engineering