Elastic properties of MgB 2 and SiC-doped MgB 2 superconductors

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We investigated the elastic properties of MgB 2 and 5 wt.% SiC-doped MgB 2 superconductors utilizing the pulse-echo overlap technique. Longitudinal and shear ultrasound velocities were measured for each sample at 80 K and 300 K. The measured velocities at 80 K were used to calculate the various elastic moduli, i.e. longitudinal (C L), shear (G), bulk (B) and Young's (Y) modulus, and the Debye temperature θ D, for both samples. The high θ D at 694 K and 706 K obtained for MgB 2 and SiC-doped MgB 2, respectively, provide strong evidences via direct acoustic measurements to support numerous theoretical and non-acoustic data-based calculations. At 300 K, the higher longitudinal velocity of the pure MgB 2 compared to the doped MgB 2 but converging towards the same value of longitudinal modulus at 80 K, seems to suggest that the SiC-doped MgB 2 undergoes greater elastic stiffening through temperature range of 300 K down to 80 K. Using the θ D values, the electron-phonon coupling constant λ was calculated within the BCS framework and the two dimensional van Hove scenario. The results led us to conclude that MgB 2 is a moderately-strong coupled superconductor.

Original languageEnglish
Title of host publicationAdvanced Materials Research
Pages304-308
Number of pages5
Volume501
DOIs
Publication statusPublished - 2012
Event26th Regional Conference on Solid State Science and Technology, RCSSST 2011 - Seremban, Negeri Sembilan
Duration: 22 Nov 201124 Nov 2011

Publication series

NameAdvanced Materials Research
Volume501
ISSN (Print)10226680

Other

Other26th Regional Conference on Solid State Science and Technology, RCSSST 2011
CitySeremban, Negeri Sembilan
Period22/11/1124/11/11

Fingerprint

Superconducting materials
Debye temperature
Elastic moduli
Ultrasonics
Acoustics
Electrons
Temperature

Keywords

  • Debye temperature
  • Elastic properties
  • Mgb
  • Ultrasound velocity

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Nor Azah, N. J., Abd. Shukor, R., & Chen, S. K. (2012). Elastic properties of MgB 2 and SiC-doped MgB 2 superconductors. In Advanced Materials Research (Vol. 501, pp. 304-308). (Advanced Materials Research; Vol. 501). https://doi.org/10.4028/www.scientific.net/AMR.501.304

Elastic properties of MgB 2 and SiC-doped MgB 2 superconductors. / Nor Azah, Nik Jaafar; Abd. Shukor, Roslan; Chen, S. K.

Advanced Materials Research. Vol. 501 2012. p. 304-308 (Advanced Materials Research; Vol. 501).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nor Azah, NJ, Abd. Shukor, R & Chen, SK 2012, Elastic properties of MgB 2 and SiC-doped MgB 2 superconductors. in Advanced Materials Research. vol. 501, Advanced Materials Research, vol. 501, pp. 304-308, 26th Regional Conference on Solid State Science and Technology, RCSSST 2011, Seremban, Negeri Sembilan, 22/11/11. https://doi.org/10.4028/www.scientific.net/AMR.501.304
Nor Azah NJ, Abd. Shukor R, Chen SK. Elastic properties of MgB 2 and SiC-doped MgB 2 superconductors. In Advanced Materials Research. Vol. 501. 2012. p. 304-308. (Advanced Materials Research). https://doi.org/10.4028/www.scientific.net/AMR.501.304
Nor Azah, Nik Jaafar ; Abd. Shukor, Roslan ; Chen, S. K. / Elastic properties of MgB 2 and SiC-doped MgB 2 superconductors. Advanced Materials Research. Vol. 501 2012. pp. 304-308 (Advanced Materials Research).
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