Surface superconducting states in a polycrystalline MgB${}_2$ sample

Abstract

We report results of dc magnetic and ac linear low-frequency study of a polycrystalline MgB${}_2$ sample. AC susceptibility measurements at low frequencies, performed under dc fields parallel to the sample surface, provide a clear evidence for surface superconducting states in MgB${}_2$.

4 pages and 5 figures

References in corpus (1)

• Ginzburg-Landau theory of vortices in a multi-gap superconductor