The upper critical field of multiband superconductors is an important quantity that can reveal
details about the nature of the superconducting pairing. Here we experimentally map out the …

Among the iron-based superconductors, the so-called 1144 family has, in recent years,
attracted significant interest due to its stoichiometric nature, with materials robust towards …

The second magnetization peak (SMP) appears in most superconductors and is crucial for
the understanding of vortex physics as well as the application. Although it is well known that …

With excellent superconducting properties such as high T c, large H c2, small anisotropy,
and large J c, developments of superconducting wires and tapes of iron-based …

The importance of type-II superconductors with strong pinning comes from their ability to
carry large electrical currents in the presence of a magnetic field. We report on the results of …

Among IBSC superconductors, the 1144 family (AAE Fe4As4 with A= alkali metal, AE=
alkaline-earth metal), has attracted considerable interest in recent years because of their …

The current carrying capability of type II superconductors under magnetic fields is
determined to a large extent by the interaction of superconducting vortices with pinning …

Abstract We have synthesized CaKFe 4 As 4 single crystals by a simple one-step method. X-
ray analysis suggests that the single crystals are c-axis orientation and no obvious impurity …

Large critical current density and low magnetic relaxation are the main challenges for
practical applications of high-temperature superconductors (HTSs). Magnetic relaxation …

We study the influence of random point disorder on the vortex dynamics and critical current
densities J c of CaKFe 4 As 4 single crystals by performing magnetization measurements …