2001/03/02 by J. D. Jorgensen, D. G. Hinks, S. Short · 1 citation
Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.63.224522
published as Phys.Rev.B 63,224522 (2001) · 14 pages, 5 figures
arxiv created 2001/03/02 · openalex publication_date 2001/05/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have determined the structural properties of the superconducting compound MgB2 as a function of temperature from 11 to 297 K and as a function of hydrostatic pressure up to 0.62 GPa using neutron powder diffraction. This compound, when compared to other diborides with the same structure, is characterized by unusually large anisotropies of both the thermal expansion and compressibility, with the c-axis responses being substantially larger. We speculate that the comparatively weaker metal-boron bonding in MgB2 manifested by these lattice responses, is important for establishing the structural features that give rise to high-Tc superconductivity in this structure type.