Structural aspect of the problem of designing superconducting materials based on Bi-2212 ion-plasma coatings for operation in strong magnetic fields

Abstract

The Bi-2212 crystal structure parameters and the structural states of the material of thick ion-plasma coatings are analyzed during their production. These structural states include the amorphization of the coating material; changes in the modulated structure of Bi-2212; the formation of a basal texture, which characterizes oriented grain growth during heat treatment; and the improvement of integrain contacts. Problems related to the creation of high-current superconducting Bi-2212-based composites and those related to Chevrel phases, which began to be studied a decade earlier, are considered to be common. The differences in the changes of the critical currents of these materials in an applied magnetic field are associated with the difference in the superconducting fragments in their crystal structures. The development of studies dealing with the creation of superconducting composites containing ion-plasma coatings and intended for operation in strong magnetic fields is considered.