Optically induced changes in the magnetic properties of the ceramic superconductor La1.8Ba0.2CuO4
R. Laiho, E. Lähderanta, L. Säisä, Gy. Kovács, G. Zsolt, I. Kirschner, I. Halász
DOI 10.1103/PhysRevB.42.347 · Physical Review B
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Abstract
Optically induced changes have been observed in the magnetic properties of the ceramic superconductor La1.8Ba0.2CuO4. The most prominent feature of our data is the light-induced change of the magnetic moment, proportional to T−1/2exp(a/kT), where a is a constant when the sample is cooled below ∼Tc/2. Results obtained in applied magnetic fields of 1, 9, and 26 Oe suggest that the observed effect has contributions from a weakening of the intergranular Josephson junctions under illumination as well as from an additional form of optically induced flux creep, which depends on the applied magnetic field.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.8Ba0.2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36 | Pressure not reported | unknown |
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