Superconductivity and appearance of negative magnetocaloric effect in Ba1–K BiO3 perovskites, doped by Y, La and Pr

Recently, substantial attention is given to the bismuth-based perovskites for variety of electronic applications. The perovskites are used for quantum dots displays (QLED), photovoltaic systems and superconducting (HTS) devices. In this paper comprehensive studies of Ba1–xKxBi1‒yREyO3 bismuth perovskites (REBKBO, RE = Y, La or Pr) are reported. Apart from structural anomalous behavior at low temperatures, the electronic properties of the REBKBO...