Electric field distribution at low-angle grain boundaries in high-temperature superconductors
Ch. Jooss, K. Guth, V. Born, J. Albrecht
DOI 10.1103/PhysRevB.65.014505 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Electric fields E are created in type-II superconductors by thermally activated flux creep or flux flow, driven by electric currents through the specimen. Usually, an average value 〈E〉=V/L is determined in resistive four-terminal-transport measurements by measuring the voltage V between two contacts with distance L as a function of the applied current. However, this average value can deviate by orders of magnitude of the true local value E(x,y), if inhomogeneities like grain boundaries are present in the specimen. In this article, we show the spatial distribution of E(x,y) of high-temperature superconducting bicrystalline films with a low-angle grain boundary in the flux-creep state. Even in a somewhat “relaxed state,” the electric-field value in bicrystalline samples varies by about two orders of magnitude.
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. | — | Pressure not reported | unknown |
Similar papers
Thermopower measurements of high-temperature superconductors: Experimental artifacts due to applied thermal gradient and a technique for avoiding them
similarity 0.97M. Putti et al.
Source status unknown — claims are unverified
Symmetry of the remanent-state flux distribution in superconducting thin strips: Probing the critical state
similarity 0.97A. V. Bobyl et al.
Source status unknown — claims are unverified
ac susceptibility response of thin-film superconductors near Tc: A theoretical study
similarity 0.97J. Z. Sun et al.
Source status unknown — claims are unverified
Distribution of activation energies for thermally activated flux motion in high-Tc superconductors: An inversion scheme
similarity 0.96C. W. Hagen & R. Griessen
Source status unknown — claims are unverified
Magnetic relaxation, current-voltage characteristics, and possible dissipation mechanisms for high-Tc superconducting thin films of Y-Ba-Cu-O
similarity 0.96J. Z. Sun et al.
Source status unknown — claims are unverified
Use of Kramers-Kronig relations to extract the conductivity of high-Tc superconductors from optical data
similarity 0.96D. Miller & P. L. Richards
Source status unknown — claims are unverified