Effect of heating rates on superconducting properties of pure MgB2, carbon nanotube- and nano-SiC-doped in situ MgB2/Fe wires

Authors

S. K. Chen, University of Cambridge, UK
K. S. Tan, University of Cambridge, UK
B. A. Glowacki, University of Cambridge, UK
W. K. Yeoh, University of Wollongong
Saeid Soltanian, University of WollongongFollow
J. Horvat, University of WollongongFollow
S. X. Dou, University of WollongongFollow

RIS ID

13706

Publication Details

This article was originally published as: Chen, SK, Tan, KS, Glowacki, BA, Yeoh, WK, Soltanian, S, Horvat, J & Dou, SX, Effect of heating rates on superconducting properties of pure MgB2, carbon nanotube- and nano-SiC-doped in situ MgB2/Fe wires, Applied Physics Letters, 2005, 87,182504-1-182504-3, and may be found here. Copyright (2005) American Institute of Physics, This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Abstract

The influence of heating rates and annealing temperatures on the transition temperatures (Tc) and critical current densities (Jc) of pure MgB2, carbon nanotube- and nano-SiC-doped in situ monofilamentary MgB2/Fe wires was investigated. It was found that higher Jc was obtained for pure MgB2 samples when heat treated with slower heating rates. SiC-doped samples also have higher Jc with slower heating rates, but the Jc is less sensitive to annealing temperatures. However, the Jc of the carbon nanotube-doped wire was found to be insensitive to heating rates. The variation in Tc and Jc with heating rate, and the different behaviors of differently doped MgB2/Fe wires, make it essential to carefully select the optimum heating rates for heat treatment.