High-Resolution Thermal Expansion of MgB2

R. Lortz; C. Meingast; D. Ernst; B. Renker; D. D. Lawrie; J. P. Franck

High-Resolution Thermal Expansion of MgB2

Superconductivity 2007-05-23 v1

Authors: R. Lortz , C. Meingast , D. Ernst , B. Renker , D. D. Lawrie , J. P. Franck

Abstract

The thermal expansion of polycrystalline MgB2 from 5-300 K is studied using high-resolution capacitance dilatometry. The thermal expansivity exhibits a small jump of -5.8x10-8 K-1 at Tc (in accord with expectations from the Ehrenfest relationship and published specific heat and pressure data) and a negative peak-like feature close to 5 K. No indications of any structural instabilities are observed.

Cite

@article{arxiv.cond-mat/0307157,
  title  = {High-Resolution Thermal Expansion of MgB2},
  author = {R. Lortz and C. Meingast and D. Ernst and B. Renker and D. D. Lawrie and J. P. Franck},
  journal= {arXiv preprint arXiv:cond-mat/0307157},
  year   = {2007}
}

Comments

4 pages, 2 figures

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