Tuning the pinning energy in layered superconductors
R. J. Drost, C. J. van der Beek, H. W. Zandbergen, M. Konczykowski, A. A. Menovsky, P. H. Kes
DOI 10.1103/PhysRevB.59.13612 · Physical Review B
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Abstract
Reversible magnetization measurements show that the pinning energy of vortices localized on amorphous tracks created in Bi2Sr2CaCu2O8 single crystals by heavy-ion irradiation can be adjusted by altering the irradiation angle. The pinning energy is found to be proportional to the cross-sectional area of the defects in the CuO2 planes. Both this size dependence and the observed quadratic temperature dependence of the pinning energy imply a predominant vortex core pinning interaction of pancake vortices with columnar defects as opposed to an electromagnetic pinning mechanism. An independent determination of the value of the Ginzburg-Landau coherence length is also presented.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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