Magnetic microstructure and flux dynamics of high-Tc superconductors
A. Ourmazd, J. A. Rentschler, W. J. Skocpol, D. W. Johnson, Jr.
DOI 10.1103/PhysRevB.36.8914 · Physical Review B
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Abstract
We present high-resolution Bitter patterns which reveal the magnetic microstructure of the high-Tc superconductor Ba2YCu3O7, allowing the direct observation of vortices, and their response to magnetic-field changes. By forming patterns in the presence of a time-varying magnetic field, or a transport current, we also study the dynamics of flux motion. Our results reveal a hierarchy of pinning sites and a remarkable anisotropy in the characteristics of neighboring twins, and allow the mapping of superconducting regions in the presence of circulating and transport currents.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba2YCu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95 | Pressure not reported | unknown |
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