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Uranium Doping and Thermal Neutron Irradiation Flux Pinning Effects in MgB2.
Uranium Doping and Thermal Neutron Irradiation Flux Pinning Effects in MgB2.
- Source :
- IEEE Transactions on Applied Superconductivity; Mar2004, Vol. 14 Issue 1, p33-39, 7p
- Publication Year :
- 2004
-
Abstract
- The U/n method is a well-established means of improving flux pinning and critical current performance in cuprate superconductors. The method involves the doping of the superconductor with 235 followed by irradiation with thermal neutrons to promote fission. The resultant columnar damage tracks produced by the energetic fission products pin flux vortices and improve critical current performance in magnetic fields. No such improvement could be observed when the U/n method was applied to the MgB<subscript>2</subscript>superconductor. No fission tracks could be observed in TEM, even for samples that were irradiated at the highest fluence. Gamma-ray spectroscopy indicated that fission had occurred in the expected way. The likely resistance of MgB<subscript>2</subscript> to the formation of fission tracks is highly relevant to attempts to improve flux pinning and superconducting performance in this material through the introduction of columnar defects. [ABSTRACT FROM AUTHOR]
- Subjects :
- SUPERCONDUCTORS
URANIUM
MAGNETIC fields
NEUTRONS
MAGNESIUM compounds
NUCLEAR fission
Subjects
Details
- Language :
- English
- ISSN :
- 10518223
- Volume :
- 14
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Applied Superconductivity
- Publication Type :
- Academic Journal
- Accession number :
- 13046654
- Full Text :
- https://doi.org/10.1109/TASC.2004.825384