High-Resolution Thermal Expansion of MgB2

Details High-Resolution Thermal Expansion of MgB2 High-Resolution Thermal Expansion of MgB2

2003-07-08

arxiv.org/abs/cond-mat/0307157v1

J of Low Temp.Phys.Vol.131,Nos.5/6, page 1101, 2003

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

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.

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