Abstract
The flux pinning potential and critical current of a grain and a twin boundary are evaluated for a S-S’-S junction model and a configuration of parallel magnetic field and junction plane. In the grain boundary model, the S’ domain is assumed to be disordered, to mimic oxygen disorder. Large critical currents ≈O(106 amp/cm2) are estimated for both models. The grain boundary model exhibits a “nonweak” link behavior and moderate critical current dependence on the grain misalignment angle. We briefly dicuss an approach to enhance critical currents based on our grain boundary model.
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Agassi, D., Bardo, R.D. Flux pinning in a slab model of grain and twin boundaries. J. Electron. Mater. 22, 1221–1225 (1993). https://doi.org/10.1007/BF02818064
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DOI: https://doi.org/10.1007/BF02818064