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

Measurement of Vortex Motion in a Type-II Superconductor: A Novel Use of the Neutron Spin-Echo Technique

2000 ◽  
Vol 85 (16) ◽  
pp. 3488-3491 ◽  
Author(s):  
E. M. Forgan ◽  
P. G. Kealey ◽  
S. T. Johnson ◽  
A. Pautrat ◽  
Ch. Simon ◽  
...  
Keyword(s):  
Spin Echo ◽  
Vortex Motion ◽  
Neutron Spin ◽  
Type Ii ◽  
Neutron Spin Echo ◽  
Type Ii Superconductor ◽  
Spin Echo Technique

Magnetic-spin-echo response to a moving vortex lattice in a type-II superconductor

1995 ◽  
Vol 52 (10) ◽  
pp. 7488-7494 ◽  
Author(s):  
W. G. Clark ◽  
F. Lefloch ◽  
W. H. Wong
Keyword(s):  
Vortex Lattice ◽  
Spin Echo ◽  
Type Ii ◽  
Type Ii Superconductor ◽  
Magnetic Spin ◽  
Moving Vortex

Melting of a Star-Shaped Vortex in a Type-II Superconductor

1998 ◽  
Vol 12 (23) ◽  
pp. 977-982
Author(s):  
A. Aruna ◽  
Keshav N. Shrivastava
Keyword(s):  
Melting Temperature ◽  
Type Ii ◽  
Zero Temperature ◽  
Flux Quantization ◽  
Type Ii Superconductor ◽  
Flux Lattice

Since the area of a star-shaped vortex is equal to that of a triangular vortex due to the flux quantization, the size of the star-shaped vortex is derivable from that of the triangular vortex. The fluctuation in the distance between vortices is used to find the flux-lattice melting temperature. It is found that the flux-lattice melting temperature of a star-shaped vortex is about one fourth that of a triangular vortex but at zero temperature, the melting field of a star-shaped vortex is about equal to that of the triangular vortex.

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.

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
Sign in / Sign up

Export Citation Format

Share Document