Temperature dependence of irreversible magnetization of granular superconductor

A study was made into temperature dependences of irreversible magnetization in granular superconductors cooled in a zero-intensity magnetic field and in a field of finite intensity as well as into the temperature dependence of remanent magnetization. A special attention is paid to the role of weak intergranular critical currents that manifests itself in the temperature range of phenomena of intergranular irreversibility. The upper boundary of this range is noted to be below the upper temperature boundary of phenomena of intragranular irreversibility. Temperature dependences of granular superconductor magnetization are compared to those for uniform superconductors