This paper presents a review of studies of superconductors with a porosity above 50%. The
pores in such superconducting materials allow refrigerant penetration and provide efficient …

Inhomogeneous distribution of the pinning force in superconductor results in a
magnetization asymmetry. A model considering the field distribution in superconductor was …

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Porosity affects the properties of high-T c superconductors and can improve their
performance by enhancing oxygenation, cryocooling, etc. Among other factors, the presence …

The transport properties of a novel foamed superconductor Bi 1.8 Pb 0.3 Sr 1.9 Ca 2 Cu 3 O
x have been studied. As the analysis of resistive transitions in a magnetic field shows, the …

The current-voltage characteristics of a porous superconductor Bi 2 Sr 2 Ca 2 Cu 3 O x
(Bi2223) have been measured at temperatures in the range from 10 to 90 K in magnetic …

The hysteretic dependences of the magnetoresistance of porous (38% of the theoretical
density) granular high-temperature superconductor (HTSC) Bi 1.8 Pb 0.3 Sr 1.9 Ca 2 Cu 3 O …

The magnetization of superconducting samples is influenced by their porosity. In addition to
structural modifications and improved cooling, the presence of pores also plays a role in …

The field dependences of the magnetoresistance of Bi 1.8 Pb 0.3 Sr 1.9 Ca 2 Cu 3 O x
samples with different densities, which have a foam microstructure and exhibit different …

The influence of fractal clusters of a normal phase on the dynamics of vortices in a
percolation superconductor is considered. It is established that a vortex glass state is formed …