Abstract
In order to clarify the mechanism concerning the enhancement of critical current density ( J c) due to artificial pinning centres (APC), nanometer scale Nb Cu multilayer composites have been prepared from Nb and Cu foils by the jelly-roll process. The layer thickness of the specimen was chosen using a calculation based on the phenomenological Ginzburg-Landau theory. The microstructure of the composite was investigated by SEM. The J c and critical temperature ( T c) were measured at various magnetic fields. A remarkable increase in J c was found when the layer thickness was approximately the same scale as the vortex lattice parameter. However, samples with thinner layers showed lower T c values due to the proximity effect.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
