Instability of vortex motion in high-Tc superconductors

Ali E. Khalil

doi:10.1117/12.397862

6 September 2000 Instability of vortex motion in high-T_c superconductors

Ali E. Khalil

Proceedings Volume 4058, Superconducting and Related Oxides: Physics and Nanoengineering IV; (2000) https://doi.org/10.1117/12.397862
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

A model is presented to explain the recently observed voltage jumps in BISCCO superconducting thin films. The current approach provides an additional evidence to the validity of the flux-flow instability model. The field and temperature dependencies of the critical vortex velocity were attributed to the physics of the vortex core in clean superconductors (high-Tc superconductors) which is very different from the physics of the vortex core in dirty superconductors. The quasiparticles diffusion coefficient D_qp was calculated based on the assumption that the quasiparticle motion is considered as a transport phenomena on random walks. In addition, the effects of scattering of normal excitations by quasiparticles localized in the vortex core moving together with the vortex on the inelastic scattering time of quasiparticles (Tau) _in was also calculated. The predictions of the model and the experimental observations are in excellent agreements.

Citation Download Citation

Ali E. Khalil "Instability of vortex motion in high-T_c superconductors", Proc. SPIE 4058, Superconducting and Related Oxides: Physics and Nanoengineering IV, (6 September 2000); https://doi.org/10.1117/12.397862

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