The effect of carbon doping on the upper critical field (Hc2) and resistivity of MgB2 by using sucrose (C12H22O11) as the carbon source

Authors

Yun Zhang, University of WollongongFollow
Sihai Zhou, University of WollongongFollow
Cheng Lu, University of WollongongFollow
Konstantin Konstantinov, University of WollongongFollow
S. X. Dou, University of WollongongFollow

RIS ID

31333

Publication Details

Zhang, Y., Zhou, S., Lu, C., Konstantinov, K. K. and Dou, S. Xue. (2009). The effect of carbon doping on the upper critical field (H_c2) and resistivity of MgB₂ by using sucrose (C₁₂H₂₂O₁₁) as the carbon source. Superconductor Science and Technology, 22 (1), 1-5.

Abstract

In this work, sucrose was doped into MgB₂ samples to act as a carbon source. The sintering temperature varied from 850 to 1050 °C. The effects of sucrose doping and sintering temperature on the lattice parameters, microstrain, critical temperature (T_c), resistivity, and upper critical field (H_c2) have been investigated in detail. It has been found that sucrose doping results in a small depression in T_c and high resistivity, while the H_c2 performance is improved. The best performance was shown in the sucrose-doped sample sintered at 850 °C. The reason for the enhancement of H_c2 is likely to be disorder caused by C substitution for B and/or diffusion of C atoms in the MgB₂ lattice as interstitial atoms.

Grant Number

ARC/DP0770205

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205