Longitudinal critical current in a ferrite-type-II superconductor structure

1997 ◽  
Vol 39 (2) ◽  
pp. 203-206 ◽  
Author(s):  
Yu. I. Bespyatykh ◽  
V. D. Kharitonov ◽  
W. Wasylewskii
Keyword(s):  
Critical Current ◽  
Type Ii ◽  
Type Ii Superconductor

Topological Defects in the Flux-Line Lattice and Their Relationship to the Critical Current of a Type-II Superconductor

1997 ◽  
Vol 78 (24) ◽  
pp. 4633-4636 ◽  
Author(s):  
F. Pardo ◽  
F. De La Cruz ◽  
P. L. Gammel ◽  
C. S. Oglesby ◽  
E. Bucher ◽  
...  
Keyword(s):  
Critical Current ◽  
Flux Line ◽  
Topological Defects ◽  
Type Ii ◽  
Line Lattice ◽  
Flux Line Lattice ◽  
Type Ii Superconductor

scholarly journals Interfacial control of vortex-limited critical current in type-II superconductor films

2021 ◽  
Vol 104 (18) ◽  
Author(s):  
Marius K. Hope ◽  
Morten Amundsen ◽  
Dhavala Suri ◽  
Jagadeesh S. Moodera ◽  
Akashdeep Kamra
Keyword(s):  
Critical Current ◽  
Type Ii ◽  
Type Ii Superconductor ◽  
Superconductor Films

Interfacial studies in Nb3Sn superconductors

1991 ◽  
Vol 49 ◽  
pp. 590-591
Author(s):  
Ernest L. Hall ◽  
Lee E. Rumaner ◽  
Mark G. Benz
Keyword(s):  
Grain Size ◽  
Grain Boundaries ◽  
Flux Pinning ◽  
Size Control ◽  
High Magnetic Fields ◽  
Type Ii ◽  
Reaction Interface ◽  
Liquid Diffusion ◽  
Type Ii Superconductor ◽  
Grain Size Control

The intermetallic compound Nb3Sn is a type-II superconductor of interest because it has high values of critical current density Jc in high magnetic fields. One method of forming this compound involves diffusion of Sn into Nb foil containing small amounts of Zr and O. In order to maintain high values of Jc, it is important to keep the grain size in the Nb3Sn as small as possible, since the grain boundaries act as flux-pinning sites. It has been known for many years that Zr and O were essential to grain size control in this process. In previous work, we have shown that (a) the Sn is transported to the Nb3Sn/Nb interface by liquid diffusion along grain boundaries; (b) the Zr and O form small ZrO2 particles in the Nb3Sn grains; and (c) many very small Nb3Sn grains nucleate from a single Nb grain at the reaction interface. In this paper we report the results of detailed studies of the Nb3Sn/Nb3Sn, Nb3Sn/Nb, and Nb3Sn/ZrO2 interfaces.

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