Raman spectroscopy: Alternate method for strain and carbon substitution study in MgB2

Authors

Wai Kong Yeoh, The University Of Sydney
Rongkun Zheng, University of Sydney
S P. Ringer, University of Sydney
W X. Li, University of WollongongFollow
Xun Xu, University of WollongongFollow
S K. Chen, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
J L. MacManus-Driscoll, University of Cambridge, Cambridge, U.K

RIS ID

42442

Publication Details

Yeoh, W. Kong., Zheng, R., Ringer, S. P., Li, W. X., Xu, X., Chen, S. K. & MacManus-Driscoll, J. L. (2011). Raman spectroscopy: Alternate method for strain and carbon substitution study in MgB2. IEEE Transactions on Applied Superconductivity, 21 (3), 2623-2626.

Abstract

In the present work, Raman spectroscopy is employed to study the strain and carbon substitution effect of SiC doped polycrystalline MgB₂. We demonstrated that Raman spectroscopy analysis is more accurate to estimate the carbon substitution compared to the X-ray diffraction analysis. Raman result showed that lattice shrinkage cannot account alone for carbon incorporation where high level of lattice distortion is attributing to both C substitution and lattice strain effect. Our result provides alternative explanation for lattice variation in the non-carbon doped MgB₂ which is basically due to lattice strain.