DocumentCode
1242160
Title
Magnetic properties of neutron irradiated and doped MgB2 superconductors
Author
Trociewitz, U.P. ; Sastry, P.V.P.S.S. ; Wyda, A. ; Crockett, K. ; Schwartz, J.
Author_Institution
Nat. High Magnetic Field Lab., Florida State Univ., Tallahassee, FL, USA
Volume
13
Issue
2
fYear
2003
fDate
6/1/2003 12:00:00 AM
Firstpage
3320
Lastpage
3323
Abstract
Studies on the effect of neutron irradiation on MgB2 superconductor showed a systematic lowering of Tc with increasing neutron fluence. The lower Tc made it difficult to observe the marginal enhancement of flux pinning properties in the neutron irradiated MgB2 powders. Partial substitution of Mg in MgB2 by Ti, V and Nb yielded pure samples up to 10 at.% doping level. These substitutions had no affect on Tc, which remained constant at 39 K. The effect of doping Mg by Ti, V, and Nb on the flux pinning properties of MgB2 was investigated by magnetization measurements. Comparison of the magnetization hysteresis loop widths of the undoped and doped samples showed that the V-doped powders had larger hysteresis loop widths compared to undoped samples indicating enhanced flux pinning in the V-doped samples compared to the undoped and Ti- and Nb-doped samples.
Keywords
critical current density (superconductivity); flux pinning; magnesium compounds; magnetisation; neutron effects; superconducting transition temperature; type II superconductors; 39 K; MgB2 superconductors; MgB2:Nb; MgB2:Ti; MgB2:V; doping; flux pinning; magnetic properties; magnetization; magnetization hysteresis loop; neutron irradiation; transition temperature; Doping; Flux pinning; Magnetic fields; Magnetic hysteresis; Magnetic properties; Magnetization; Neutrons; Niobium; Powders; Superconductivity;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2003.812302
Filename
1212337
Link To Document