Surface superconducting states in yttrium hexaboride single crystal in a tilted magnetic field

Abstract

We present the results of an experimental study of the nucleation of superconductivity at the surface of a single crystal YB${}_6$ in a tilted dc magnetic field. A recently developed experimental technique allowed us to determine $H_{c3}$ at each side of the sample as a function of the angle between the dc magnetic field and the surface. Experiment shows that the ratio $H_{c3}/H_{c2}\approx 1.28$ in the direction perpendicular to the surface dc field while according to the theory this ratio should be equal to 1. This sharp distinction cannot be ascribed to the surface roughness.

6 pages, 8 figures

References in corpus (4)

• Superconductivity mediated by a soft phonon mode: specific heat, resistivity, thermal expansion and magnetization of YB6
• Linear and nonlinear low frequency electrodynamics of the surface superconducting states in an yttrium hexaboride a single crystal
• The low-frequency response in the surface superconducting state of ZrB${}_{12}$ single crystal}
• Voltage noise and surface current fluctuations in the superconducting surface sheath

Cited by in corpus (2)

• 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