Open AccessStudy of Superconducting, Structural, and Thermal Properties of SnO2 Added MgB2 Bulks
Author(s) -
Danlu Zhang,
M.D. Sumption,
E. W. Collings,
C J Thong,
M. Rindfleisch
Publication year - 2019
Publication title -
ieee transactions on applied superconductivity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.467
H-Index - 84
eISSN - 1558-2515
pISSN - 1051-8223
DOI - 10.1109/tasc.2019.2905436
Subject(s) - materials science , superconductivity , condensed matter physics , thermal , thermodynamics , physics
A series of SnO 2 added MgB 2 bulk superconductors were prepared by in situ route to study the effect of oxygen doping on superconducting and structural properties of MgB 2 . Several (MgB 2 ) 1- x (SnO 2 ) x samples were fabricated with x ranging from 0, 3 wt%, 4 wt%, and 6 wt%. Upper critical field ( B C 2 ) and irreversible field ( B irr ) were measured by physical property measurement system. Thermal analysis was performed on the as-received SnO 2 powder. Critical current densities ( J cm ) were obtained at 4.2 K using magnetic measurement. X-ray diffraction results showed evidence of full SnO 2 decomposition in all the doped bulk samples and a shift of a -axis in MgB 2 lattice was seen. Oxygen was successfully released during heat treatment, yet no enhancement of B C 2 or B irr was seen, indicating that oxygen atoms did not end up in the host lattice. Further exploration of different processing procedures is still needed in order to get oxygen substitution on the host lattice sites.