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 …

An approach to describing the R (H) magnetoresistance hysteresis in granular high-
temperature superconductors and behavior of the R (T) resistive transition in these objects in …

Granular high-temperature superconductors (HTSs) exhibit magnetotransport properties,
including the clockwise magnetoresistance hysteresis. The hysteresis is explained by the …

A method to determine a value of the effective field in the intergrain medium of a granular
superconductor is proposed. The space between superconducting grains is considered to …

The temperature evolution of the magnetoresistance hysteresis in the granular YBa 2 Cu 3 O
7-δ high-temperature (TC≈ 92 K) superconductor has been investigated. The …

The influence of thermomagnetic prehistory on the behavior of a resistive transition R (T) in
external magnetic fields of polycrystalline YBa 2 Cu 3 O 7 and Bi 1.8 Pb 0.3 Sr 1.9 Ca 2 Cu 3 …

It has been suggested that the measured magnetic properties of hydrides under pressure
claimed to be high-temperature superconductors indicate that the materials are granular …

Dissipation in granular high-temperature superconductors (HTSs) during the passage of
macroscopic transport current j is mainly determined by carrier tunneling through intergrain …

Granular high-temperature superconductors (HTSs) are characterized by the hysteretic
behavior of magnetoresistance. This phenomenon is attributed to the effective field in the …

The magnetovoltage measurements (V–H curves) with different sweeping rates (dH/dt) of
the external magnetic field in Ag-added polycrystalline YBa 2 Cu 3 O 7− x sample …