Dynamic Matching of Vortex Lattice in Superconducting Multilayers
A. Gurevich, E. Kadyrov, D. C. Larbalestier
DOI 10.1103/PhysRevLett.77.4078 · Physical Review Letters
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Abstract
We observed oscillations of a nonlinear flux flow resistivity R(j,H) as a function of a parallel magnetic field 6<H<9T in Nb-Ti/Cu multilayers. We show that the oscillations in R(H), which have the field period ΔH≈0.1T independent of temperature and current, indicate a long-range order in the rapidly moving vortex structure. The critical current Ic(H) exhibits no oscillations characteristic of R(H). We propose an explanation of the effect in terms of dynamic matching of the moving vortex lattice with periodic microstructure and show that both ΔH and the amplitude of the oscillations of R(H) are inversely proportional to the sample thickness.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb-Ti Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.85 | Pressure not reported | midpoint |
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