Letter

Journal of Superconductivity and Novel Magnetism

, Volume 23, Issue 7, pp 1229-1230

Calculated Sound Velocity Change in LaFeAsO0.89F0.11 at the Superconducting Transition

  • R. Abd-ShukorAffiliated withSchool of Applied Physics, Universiti Kebangsaan Malaysia Email author 

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Abstract

The changes in the bulk modulus and sound velocity in LaFeAsO0.89F0.11 superconductor at the transition temperature were calculated using various thermodynamic data. Step discontinuities of 16 ppm in the bulk modulus and 5 ppm in the longitudinal sound velocity are expected at the superconducting transition. The calculated acoustic Debye temperature for the parent compound is 367 K and this is slightly higher than the values determined by specific heat measurements for LaO0.89F0.11FeAs.

Keywords

Debye temperature Elastic modulus LaFeAsO0.89F0.11 superconductor