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Updated: Jul 5, 2025
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Scanning SQUID Study of Vortex Manipulation by Local Contact
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Scanning Spin Probe Based on Magnonic Vortex Quantum Cavities
Carlos A González-Gutiérrez1,2,3, David García-Pons1, David Zueco1
1Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza ES-50009, Spain.
ACS Nano
|January 25, 2024
Summary
This study proposes a novel nanoscale scanning electron paramagnetic resonance (EPR) sensor using ferromagnetic vortex cores. This device integrates magnetic fields, radio frequency fields, and sensitive detection for single-spin imaging.
Area of Science:
- Condensed Matter Physics
- Quantum Sensing
- Nanotechnology
Background:
- Nanoscale electron paramagnetic resonance (EPR) requires static magnetic fields, field gradients, radio frequency (rf) fields, and sensitive detection.
- Current methods often involve complex setups with external components like coils or scanning probes.
Purpose of the Study:
- To theoretically propose a single-device EPR scanning sensor.
- To leverage the unique properties of magnetic vortex cores for nanoscale EPR.
Main Methods:
- Theoretical modeling and numerical simulations.
- Utilizing the static magnetic field and gradients from a vortex core ground state.
- Employing the precessional motion of the vortex core to generate rf magnetic fields.
- Investigating spin-magnon coupling for detection.
Main Results:
- The proposed vortex core sensor integrates all necessary components for EPR.
- Simulations indicate the potential for detecting single spins on the surface of low-damping magnets.
- Vortex nanocavities show promise for coupling with molecular qubits.
Conclusions:
- A single-device nanoscale EPR sensor based on ferromagnetic vortex cores is theoretically feasible.
- This approach offers potential for high-resolution EPR microscopy and quantum information processing applications.
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