Flux-diffusion-induced anomalies in the field-cooled magnetization of high-temperature superconductors
A. A. Zhukov, A. V. Volkozub, P. A. J. de Groot
DOI 10.1103/PhysRevB.52.13013 · Physical Review B
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Abstract
The field-cooled magnetization of Bi2Sr2CaCu2Ox, Tl2Ba2CaCu2Oy, and YBa2Cu3O7−z single-crystalline superconductors has been studied as a function of thermal history. A dependence of the Meissner fraction on the sample cooling rate was found. After a more rapid cooling, the temperature dependence of the magnetization during warming showed a pronounced minimum just before the transition into the normal state. This behavior has been analyzed within a generalized critical-state model, taking into account nonlinear flux diffusion. In the case of linear temperature dependences of Hc1 and conductivity, an exact solution was found which qualitatively reproduces the experiment.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | onset |
| YBa2Cu3O7-z Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.8 | Pressure not reported | onset |
| Tl2Ba2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 103 | Pressure not reported | onset |
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