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Superior MgB2 Superconducting Wire Performance through Oxygen-Free Pyrene Additive.
- Source :
- Applied Physics Express; Jan2012, Vol. 5 Issue 1, p1-1, 1p
- Publication Year :
- 2012
-
Abstract
- There is great potential to further enhance the critical current density (J<subscript>c</subscript>) performance of MgB<subscript>2</subscript> wires. Herein, MgB<subscript>2</subscript> wires were fabricated by using oxygen-free pyrene as dopant, and field and temperature dependences of J<subscript>c</subscript> were systematically evaluated. In addition, a strong correlation among sintering temperature, structural parameters, microstructure, and superconducting performance was established. High lattice distortion was obtained by using pyrene as an additive as well as by using a low-temperature sintering process. This arises from vacancy formation, as confirmed by first-principles calculations. The microscopic defects introduce impurity scattering, resulting in the enhancement of the irreversibility field and J<subscript>c</subscript>. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18820778
- Volume :
- 5
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Applied Physics Express
- Publication Type :
- Academic Journal
- Accession number :
- 100193983
- Full Text :
- https://doi.org/10.1143/APEX.5.013101