Calculated elastic properties of MgB2 at the superconducting transition

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The elastic properties of the intermetallic MgB2 superconductor at the superconducting transition temperature are calculated using various thermodynamic data. Our calculations show that a step discontinuity of 66 ppm in the bulk modulus and 76 ppm in the Young's modulus are expected at the superconducting transition. A step discontinuity of 21 ppm in the longitudinal sound velocity is also expected at the transition temperature. Such anomaly should be detectable by most elastic measurements. The calculated acoustic Debye temperature is 880 ± 30 K and this is within the range of values determined by various non-acoustic methods. The electron-phonon coupling constant calculated for the weak and strong coupling limit of the BCS theory as well as the two dimensional van Hove scenario shows that MgB2 is a moderately strong-coupled BCS type superconductor.

Original languageEnglish
Pages (from-to)503-505
Number of pages3
JournalSolid State Communications
Volume122
Issue number9
DOIs
Publication statusPublished - Jun 2002

Fingerprint

Superconducting materials
Superconducting transition temperature
discontinuity
elastic properties
Elastic moduli
transition temperature
Debye temperature
BCS theory
Acoustic wave velocity
acoustic velocity
trucks
bulk modulus
Intermetallics
intermetallics
modulus of elasticity
Acoustics
specific heat
Thermodynamics
anomalies
thermodynamics

Keywords

  • A. MgB
  • D. Acoustic properties
  • D. Elasticity
  • D. Thermodynamic properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Calculated elastic properties of MgB2 at the superconducting transition. / Abd. Shukor, Roslan.

In: Solid State Communications, Vol. 122, No. 9, 06.2002, p. 503-505.

Research output: Contribution to journalArticle

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AB - The elastic properties of the intermetallic MgB2 superconductor at the superconducting transition temperature are calculated using various thermodynamic data. Our calculations show that a step discontinuity of 66 ppm in the bulk modulus and 76 ppm in the Young's modulus are expected at the superconducting transition. A step discontinuity of 21 ppm in the longitudinal sound velocity is also expected at the transition temperature. Such anomaly should be detectable by most elastic measurements. The calculated acoustic Debye temperature is 880 ± 30 K and this is within the range of values determined by various non-acoustic methods. The electron-phonon coupling constant calculated for the weak and strong coupling limit of the BCS theory as well as the two dimensional van Hove scenario shows that MgB2 is a moderately strong-coupled BCS type superconductor.

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