We report synthesis, structure/micro-structure, resistivity under magnetic field [ρ(T)H], Raman spectra, thermoelectric power S(T), thermal conductivity κ(T), and magnetization of ambient pressure argon annealed polycrystalline bulk samples of MgB<Subscript>2</Subscript>, processed under identical conditions. The...</subscript>

In order to characterize flux flow through disordered type-II superconductors, we investigate the effects of columnar and point defects on the vortex velocity/voltage power spectrum in the driven non-equilibrium steady state. We employ three-dimensional Metropolis Monte Carlo simulations to...

The influence of non-uniform J<Subscript>c</Subscript> distributions on flux jumps in high-temperature superconductors is investigated with the simplified models in the form of a composite superconducting slab consisting of different pinning regions. The magnetization loops and flux jumps for the simplified models are...</subscript>

In the hard core limit, interacting vortices in planar type II superconductors can be modeled as non-interacting one dimensional fermions propagating in imaginary time. We use this analogy to derive analytical expressions for the probability density and imaginary current of vortex lines...

Measurements of the electrical resistivity as a function of temperature, ρ(T), for different values of applied magnetic field, B<Subscript>a</Subscript> (0 ≤ B<Subscript>a</Subscript> ≤ 50 mT), were performed in polycrystalline samples of Bi<Subscript>1.65</Subscript>Pb<Subscript>0.35</Subscript>Sr<Subscript>2</ Subscript>Ca<Subscript>2</Subscript> Cu<Subscript>3</Subscript>O<Subscript>10+δ</Subscript> subjected to different uniaxial compacting pressure (UCP). We...</subscript></subscript></subscript><//></subscript></subscript></subscript></subscript></subscript>

The flux dynamics in a polycrystalline sample of Bi<Subscript>1.7</Subscript>Pb<Subscript>0.3</Subscript>Sr<Subscript>2</Su bscript>Ca<Subscript>2</Subscript>Cu<Subscript>3</Subscript>O<Subscript>x< /Subscript> with a macroscopic cylindrical hole (CH) drilled was investigated by slow transport relaxation (V-t curves) and magnetovoltage measurements (V-H curves). It was monitored that there are several discontinuities in the time...</subscript></subscript></subscript><//su></subscript></subscript></subscript>

Resistivity vs. temperature measurements on La<Subscript>0.7</Subscript>Ca<Subscript>0.3</Subscript>MnO<Subscript>3</S ubscript>/YBa<Subscript>2</Subscript>Cu<Subscript>3</Subscript>O<Subscript >7-δ </Subscript>/La<Subscript>0.7</Subscript>Ca<Subscript>0.3</Subscript>MnO<S ubscript>3</Subscript> (LCMO/YBCO/LCMO) trilayers with different YBCO thickness, were performed in external magnetic field H up to 8 T. By evaluating the activation energy U from the slope of the resistivity Arrhenius plot, a...</s></subscript></subscript></subscript></subscript></subscript><//s></subscript></subscript></subscript>

We present a study of magnetization and transport properties of superconducting Nb thin films deposited on nanoporous aluminium oxide templates. Periodic oscillations in the critical temperature vs. field, matching effects in fields up to 700 mT and strongly enhanced critical currents were...

We review the use of superconductors as a playground for the experimental study of front roughening and avalanches. Using the magneto-optical technique, the spatial distribution of the vortex density in the sample is monitored as a function of time. The roughness and growth exponents...