2003/07/08 by R. Lortz, C. Meingast, D. Ernst +3
Physics and Astronomy · #cond-mat.supr-con
published as J of Low Temp.Phys.Vol.131,Nos.5/6, page 1101, 2003 · 4 pages, 2 figures
arxiv created 2003/07/08 · arxiv updated 2009/12/01
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.