Evaluation of carbon incorporation and strain of doped MgB2 superconductor by Raman spectroscopy.

• Main Authors: Yeoh, W. K., Zheng, R. K., Ringer, S. P., Li, W. X., Xu, X., Dou, S. X., Chen, Soo kien, MacManus-Driscoll, J. L.
• Format: Article
• Language: English; English
• Published: Elsevier 2011
• Online Access: http://psasir.upm.edu.my/id/eprint/24751/1/Evaluation%20of%20carbon%20incorporation%20and%20strain%20of%20doped%20MgB2%20superconductor%20by%20Raman%20spectroscopy.pdf; http://psasir.upm.edu.my/id/eprint/24751/; http://www.elsevier.com/

Raman spectroscopy is employed to study both the strain and the carbon substitution level in SiC-doped MgB2 bulk samples. Raman spectroscopy was demonstrated to be a better method to distinguish the individual influences of strain and carbon than standard X-ray diffraction. It is found that the lattice parameter correlation method for C content determination is invalid for highly strained samples. Our result also provides an alternative explanation for lattice variation in non-carbon-doped MgB2, which is basically due to lattice strain.