Vortex-glass transformation within the surface superconducting state of $\beta$-phase Mo${}_{1-x}$Re${}_x$ alloys

Abstract

We have performed an experimental study on the temperature dependence of electrical resistivity $\rho$($T$) and heat capacity $C$($T$) of the Mo${}_{1-x}$Re${}_x$ $(x=0.20,0.25)$ alloy superconductors in different magnetic fields. In the presence of applied magnetic field, the electrical resistivity of these alloys go to zero at a temperature well above the bulk superconducting transition temperature obtained with the help of heat capacity measurements in the same magnetic field. Our study indicates the presence of surface superconducting state in these alloys, where the flux lines are pinned in the surface sheath of the superconductor. The configuration of the flux-lines (2d pancake-like) in the surface sheath is understood in the realm of the flux-spot model. Experimental evidence in support of the surface mixed-state state or "Kulik vortex-state" and the occurrence of a vortex-liquid to vortex-glass transition is presented.

arXiv comment15 pages, 9 figures

References in corpus (15)

• Temperature dependence and anisotropy of the bulk upper critical field H_c2 of MgB_2
• The Bose-glass phase in twinned YBaCuO(123)
• Superconducting Transition and Phase Diagram of Single Crystal MgB2
• Thermally activated energy and flux flow Hall effect of Fe1+y(Te1-xSx)z
• Vortex-glass phase transition and superconductivity in an under- doped (Ba,K)Fe2As2 single crystal
• Surface Contribution to the Superconducting Properties of MgB2 Single Crystals
• Evidence of multiband superconductivity in the $\beta$-phase Mo${}_{1-x}$Re${}_x$ alloys
• Strong electron-phonon coupling and multiband effects in the superconducting $\beta$-phase Mo${}_{1-x}$Re${}_x$ alloys
• Vortex-glass transition in superconducting Nb/Cu superlattices
• Phase Transition in the Two-Dimensional Gauge Glass
• Finite-temperature resistive transition in the two-dimensional XY gauge glass model
• Glass-like low frequency ac response of ZrB${}_{12}$ and Nb single crystals in the surface superconducting state
• Phase Transitions in the Two-Dimensional Random Gauge XY Model
• Decoupling transition of two coherent vortex arrays within the surface superconductivity state
• Magnetic irreversibility and pinning force density in the Mo${}_{100-x}$Re${}_x$ alloy superconductors

Cited by in corpus (3)

• Nonstandard superconductivity or no superconductivity in hydrides under high pressure
• Resistive transition of hydrogen-rich superconductors
• Broadening of In-Field Superconducting Transitions in Hydrides