2001/03/31 by A. Sharoni, Amos Sharoni, Oded Millo +4 · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-8984/13/22/109
published as J. Phys.:Condens. Matter 13, L503 (2001) · accepted to Journal of Physics Condensed Matter, revised version
arxiv created 2001/05/01 · openalex publication_date 2001/05/18 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Composites consisting of MgB 2 and Al, 11% by volume, undergo a transition-to-superconductivity onset at T C = 38 K, close to the value reported for pure MgB 2 . The transition appears to have broadened, as determined by both magnetic and transport measurements, possibly due to the proximity effect and disorder. Spatially resolved tunnelling spectroscopy at 4.2 K shows a distribution of gap structures, from Bardeen-Cooper-Schrieffer-like spectra with 2Δ/ k B T C = 3.2 to spectra that are typical for proximity superconductors.