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 (13)

• Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors
• Ginzburg-Landau theory of vortices in a multi-gap superconductor
• Anisotropy of the Upper Critical Field and Critical Current in Single Crystal MgB${}_2$
• An Overview of the Basic Physical Properties of MgB${}_2$
• Mixed state properties of superconducting MgB2 single crystals
• On the Ginzburg-Landau Analysis of the Upper Critical Field Hc2 in MgB2
• Superconducting Transition and Phase Diagram of Single Crystal MgB2
• Why magnesium diboride is not described by anisotropic Ginzburg-Landau theory
• Anisotropy parameters of superconducting MgB${}_2$
• Two-band Effects in the Angular Dependence of Hc2 of MgB2 Single Crystals
• Surface Contribution to the Superconducting Properties of MgB2 Single Crystals
• The low-frequency response in the surface superconducting state of ZrB${}_{12}$ single crystal}
• Glass-like low frequency ac response of ZrB${}_{12}$ and Nb single crystals in the surface superconducting state

Cited by in corpus (4)

• Surface superconductivity as the primary cause of broadening of superconducting transition in Nb-films
• Onset of surface superconductivity beyond the Saint-James-de Gennes limit
• Anisotropy of the upper critical fields and the paramagnetic Meissner effect in La1.85Sr0.15CuO4 single Crystals
• Universal and shape dependent features of surface superconductivity