| Issue |
Europhys. Lett.
Volume 57, Number 3, February 2002
|
|
|---|---|---|
| Page(s) | 437 - 443 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00479-1 | |
| Published online | 01 September 2002 | |
Enhancement of critical current density in 
bulk superconductor by 
doping
1
Superconductivity Research Laboratory, ISTEC 1-10-13
Shinonome, Koto-ku, Tokyo 135, Japan
2
Superconductivity Research Group, School of Materials
Science and Engineering University of New South Wales - Sydney,
2052 NSW, Australia
Corresponding author: zhao@istec.or.jp
Received:
12
July
2001
Accepted:
12
November
2001
We studied the doping effect on the superconducting
properties and microstructure of sintered bulk
polycrystals. Using as a sintering assistant, we have
fabricated bulk materials consisting of fine 10
scale particles and achieved a high 
of 1
in
self-field and 
in 1
at 20
.
The large enhancement of is explained by the excellent
connection between grains and the high density of pinning centers
served by both grain boundaries and 
nanoparticles.
PACS: 74.60.Jg – Critical currents / 74.70.Ad – Metals; alloys and binary compounds (including A15, Laves phases, etc.) / 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics
© EDP Sciences, 2002
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