IS Y₂BaCuO₅ INCLUSION EFFECTIVE PINNING SITE IN YBa₂Cu₃O₇?

Abstract

It is possible to disperse Y₂BaCuO₅(211) inclusions into YBa₂Cu₃O₇ (123) matrix by melt processes. Since nonsuperconducting particles are known to act as pinning centers, the 211 inclusions are expected to provide flux pinning. In this paper we give evidence that the 211/123 interfaces are effective in flux pinning in melt grown YBaCuO.