Visualizing flux distribution of superconductors in external magnetic fields with magnetic force microscopy
U. H. Pi, A. Schwarz, M. Liebmann, R. Wiesendanger, Z. G. Khim, D. H. Kim
DOI 10.1103/PhysRevB.73.144505 · Physical Review B
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Abstract
We visualized the flux distribution of a Bi2Sr2CaCu2O8+δ single crystal in transversal geometry by using low temperature magnetic force microscopy in the dynamic mode. With increasing external magnetic field, the magnetic flux density exhibited a distribution, which generally followed the Bean model. When the propagating flux front passed through the imaging area, we could observe a shift of the magnetic force microscopy signal toward an unexpected direction. The origin of this shift was studied by considering very long-range magnetic force due to the specific flux and current distribution near the propagating flux front.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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