| Full text | |
| Author(s): |
Jung, Soon-Gil
[1]
;
Vanacken, J.
[1]
;
Moshchalkov, V. V.
[1]
;
Renosto, S. T.
[2]
;
dos Santos, C. A. M.
[2]
;
Machado, A. J. S.
[2]
;
Fisk, Z.
[3]
;
Albino Aguiar, J.
[4]
Total Authors: 8
|
| Affiliation: | [1] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, B-3001 Louvain - Belgium
[2] Univ Sao Paulo, Escolade Engn Lorena, Lorena, SP - Brazil
[3] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 - USA
[4] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Journal of Applied Physics; v. 114, n. 13 OCT 7 2013. |
| Web of Science Citations: | 3 |
| Abstract | |
We have investigated the critical current density (J(c)) and the flux pinning behavior in Zr0.96V0.04B2 superconductor with an AlB2 structure. V substitutions in Zr sites of non-superconducting ZrB2 system lead to superconductivity, and the 4% V-substituted Zr0.96V0.04B2 compounds show the highest superconducting transition temperature (T-c) of similar to 8.7 K. The magnetic hysteresis (M-H) loops for the Zr0.96V0.04B2 demonstrate type-II superconducting behavior in a broad temperature range, and the J(c) is estimated from the M-H loops using the Bean model. The analysis of the double-logarithmic J(c)(H) plots indicates the dominance of collective pinning in Zr0.96V0.04B2, and that J(c)(H) and magnetic field dependences of the flux pinning force density (F-p) are well fitted by the double exponential model which takes into account the existence of two superconducting gaps. (C) 2013 AIP Publishing LLC. (AU) | |
| FAPESP's process: | 11/05961-3 - Study of superconductivity in diboride and dichalcogenates of transition metal (MeB2 and MeX2) with AlB2 prototype and its variations |
| Grantee: | Sérgio Tuan Renosto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |