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Observation and control of hybrid spin-wave-Meissner-current transport modes
M Borst1, P H Vree1, A Lowther1
1Department of Quantum Nanoscience, Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ Delft, Netherlands.
Science (New York, N.Y.)
|October 26, 2023
Summary
Superconductors were used to control spin waves, enabling tunable wavelengths and local refraction for advanced magnetic devices. This research opens possibilities for novel spin-wave applications like filters and cavities.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Information Science
Background:
- Superconductors exhibit zero electrical resistivity and expel magnetic fields (Meissner effect).
- Their properties are crucial for magnetic levitation and quantum devices.
- Spin waves are collective spin excitations in magnets, promising for on-chip signal processing.
Purpose of the Study:
- To utilize superconducting diamagnetism for manipulating spin-wave transport in thin-film magnets.
- To investigate hybridized spin-wave-Meissner-current transport modes.
- To demonstrate local control over spin-wave refraction.
Main Methods:
- Employing superconducting diamagnetism to shape the magnetic environment.
- Utilizing diamond-based magnetic imaging for observation.
- Applying focused laser for local control of spin waves.
Main Results:
- Observed hybridized spin-wave-Meissner-current transport modes.
- Demonstrated temperature-tunable wavelengths of these modes.
- Achieved local control of spin-wave refraction using a laser.
Conclusions:
- Superconductor-manipulated spin-wave transport is versatile.
- Potential applications include spin-wave gratings, filters, crystals, and cavities.
- This work advances the integration of superconducting and magnetic phenomena for novel device functionalities.
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