Guidance of vortices and the vortex ratchet effect in high-Tc superconducting thin films obtained by arrangement of antidots
R. Wördenweber, P. Dymashevski, V. R. Misko
DOI 10.1103/PhysRevB.69.184504 · Physical Review B
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Abstract
Controlled trapping and guided motion of vortices via special arrangements of microholes, so-called antidots, in YBa2Cu3O7 films and devices is demonstrated. Resistive Hall-type measurements prove the presence of guided flux motion along rows of antidots. In contrast to conventional vortex motion due to vortex unpinning at currents exceeding the critical current, this motion is present down to zero current and low temperatures. It is characterized by a linear voltage–current dependence, i.e., Ohmic behavior. The latter is indicative for a novel mechanism of vortex propagation that is probably based upon flux nucleation within antidots due to the redistribution of screening currents and flux quantization. Together with trapping of vortices by isolated antidots this mechanism can be used for new devices concepts. As an example a vortex ratchet formed by a special arrangement of antidots is demonstrated.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87.2 | Pressure not reported | onset |
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