Affiliation:
1. School of Integrated Circuits & Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China
2. School of Microelectronics Hubei University Wuhan 430062 China
3. Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China
4. Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518000 China
Abstract
AbstractDetection of vector magnetic fields at nanoscale dimensions is critical in applications ranging from basic material science and fundamental physics to information storage and medical diagnostics. So far, nanoscale vector magnetic field sensing is achieved solely by exploiting a single nitrogen‐vacancy (NV) center in a diamond, by evaluating the Zeeman splitting of NV spin qubits by using the technique of an optically‐detected magnetic resonance. This protocol requires a complex optical setup and expensive detection systems to detect the photoluminescence light, which may limit miniaturization and scalability. Here, a simple approach with all‐electric operation to sensing a vector magnetic field at 200 × 200 nm2 dimensions is experimentally demonstrated, by monitoring a stochastic nanomagnet's transition probability from a metastable state, excited by a driving current due to spin‐orbit torque, to a settled state.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Huazhong University of Science and Technology
Shenzhen Virtual University Park
China Postdoctoral Science Foundation
Shenzhen Science and Technology Innovation Program
Subject
Electronic, Optical and Magnetic Materials