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Published on: September 11, 2019
Strain-insensitive flexible anomalous Hall-effect sensors for interactive wearables
Rui Xu1, Eduardo Sergio Oliveros-Mata1,2, Gilbert Santiago Canon Bermudez1
1Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany.
Npj Spintronics
|July 6, 2026
Summary
Researchers developed flexible Anomalous Hall effect (AHE) sensors that maintain stable performance under bending. A novel zero-offset Hall (ZOH) measurement strategy minimizes deformation effects, enabling applications in interactive wearables and soft robotics.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Sensor Technology
Background:
- Anomalous Hall effect (AHE) sensors are promising for interactive electronics.
- Mechanical deformation causes Hall signal drift, limiting practical use in flexible electronics.
Purpose of the Study:
- To develop AHE sensors with stable performance under mechanical deformation.
- To enable practical integration of AHE sensors in flexible and wearable devices.
Main Methods:
- Micropatterning of 1.5-nm-Co/1-nm-Pt bilayers on ultrathin foils.
- Implementing a zero-offset Hall (ZOH) measurement strategy to cancel deformation artifacts.
- Testing sensor performance down to a bending radius of 200 μm.
Main Results:
- Achieved high sensitivity of 100 Ω T⁻¹.
- Demonstrated stable sensing performance with a bending radius of 200 μm.
- Successfully decoupled mechanical deformation from magnetic response using ZOH strategy.
Conclusions:
- ZOH-enabled AHE sensors offer mechanical conformability and strain-insensitive operation.
- These sensors show significant potential for interactive wearables, human-machine interfaces, and magnetic soft robots.
