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Topologically protected superconducting ratchet effect generated by spin-ice nanomagnets.
V Rollano1, A Muñoz-Noval2, A Gomez3
1IMDEA-Nanociencia, Cantoblanco, E-28049 Madrid, Spain.
Nanotechnology
|February 22, 2019
Summary
We developed a superconducting ratchet device using frustrated spin ice nanomagnets. This innovation enables a unidirectional flow of superconducting vortices, crucial for advanced electronic applications.
Area of Science:
- Condensed Matter Physics
- Nanotechnology
- Superconductivity
Background:
- Topologically frustrated spin ice nanomagnets offer unique magnetic properties.
- Superconducting vortices can be manipulated by magnetic structures.
- Asymmetric potentials are key to ratchet effects.
Purpose of the Study:
- To design and test a novel superconducting ratchet device.
- To leverage frustrated spin ice nanomagnets for vortex control.
- To demonstrate a unidirectional superconducting vortex flow.
Main Methods:
- Fabrication of a cobalt honeycomb array in a niobium film.
- Utilizing spin ice rules to create magnetic charge distributions.
- Investigating the interaction between superconducting vortices and magnetic Néel walls.
Main Results:
- A robust superconducting ratchet effect was successfully demonstrated.
- A unidirectional net vortex flow was generated by driven vortices.
- The ratchet effect was shown to be independent of magnetic charge distribution.
Conclusions:
- The designed device effectively achieves superconducting vortex rectification.
- Topologically frustrated spin ice nanomagnets provide a viable platform for superconducting ratchet devices.
- This work opens avenues for novel superconducting electronic components.
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