Flux-flow instability and heating effects in Bi2Sr2CaCu2O8 and YBa2Cu3O7 thin films

Gerhard Jakob, P. Voss-De Haan, M. Wagner, Z. L. Xiao & Hermann Adrian
We investigated current?voltage curves of Bi2Sr2CaCu2O8 and YBa2Cu3O7 thin films. Voltage jumps due to flux-flow instabilities at high vortex-velocities were found and interpreted in the framework of the theory of Larkin and Ovchinnikov. The extensions introduced by Bezuglyj et al. account for quasiparticle heating during the measurement. While in Bi2Sr2CaCu2O8 the instability is found in the vortex-liquid phase, in YBa2Cu3O7 we observed it in the vortex-glass phase. Moreover, we studied the temporal behavior of the...
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