The effects of uranium doping and thermal neutron irradiation on the pinning properties of Ag/Bi-2223 tapes

Citation
D. Marinaro et al., The effects of uranium doping and thermal neutron irradiation on the pinning properties of Ag/Bi-2223 tapes, PHYSICA C, 341, 2000, pp. 1119-1120
Citations number
6
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
341
Year of publication
2000
Part
2
Pages
1119 - 1120
Database
ISI
SICI code
0921-4534(200011)341:<1119:TEOUDA>2.0.ZU;2-4
Abstract
Ag/Bi-2223 multifilamentary tapes doped with small quantities of UO4 powder were prepared by the powder-in-tube process. Thermal-neutron irradiation o f these tapes induces fission of the U-235 atoms, with the resulting fissio n fragments creating randomly splayed defects. An observed increase in J(c) after irradiation as well as a shift in the irreversibility line to higher fields, in comparison to nondoped samples, implies an improvement in the f lux pinning of the tapes as a result of this process. Dynamic magnetization relaxation measurements were conducted to elucidate the behaviour of the e ffective activation energy (U-eff) as a function of current density. Change s in the activation energy after irradiation are examined and related to ch anges in the pinning potential of the tapes.