Nucleation of superconducting vortices by exciting acoustic standing waves in a type-II superconductor

2008 ◽  
Vol 77 (9) ◽  
Author(s):  
Jaroslav Albert ◽  
E. M. Chudnovsky
Keyword(s):  
Standing Waves ◽  
Type Ii ◽  
Type Ii Superconductor ◽  
Superconducting Vortices ◽  
Acoustic Standing Waves

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.

Spin-echo observation of radio frequency induced flux lattice annealing (RIFLA) in a type-II superconductor

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-49-Pr10-51
Author(s):  
W. G. Clark ◽  
F. Lefloch ◽  
M. E. Hanson ◽  
W. H. Wong
Keyword(s):  
Radio Frequency ◽  
Spin Echo ◽  
Type Ii ◽  
Type Ii Superconductor ◽  
Flux Lattice

ROTATIONAL MAGNETIC PROCESSES IN A TYPE-II SUPERCONDUCTOR

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-2189-C8-2190
Author(s):  
Liwen Liu ◽  
J. S. Kouvel ◽  
T. O. Brun
Keyword(s):  
Type Ii ◽  
Type Ii Superconductor

Curved flux line near the edge of a type II superconductor

1984 ◽  
Vol 56 (1-2) ◽  
pp. 113-128 ◽  
Author(s):  
L. N. Shehata ◽  
A. G. Saif
Keyword(s):  
Flux Line ◽  
Type Ii ◽  
Type Ii Superconductor
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