Superconducting properties of aligned crystalline grains of Y1Ba2Cu3O7−δ

Abstract

A new method has been used to produce uniaxially aligned small single crystals of ${\mathrm{Y}}_1{\mathrm{Ba}}_2{\mathrm{Cu}}_3{\mathrm{O}}_{7-\delta }$. The superconducting critical current deduced from magnetization data is strongly field dependent and highly anisotropic. In the basal plane at $T=4.2\mathrm{}$ K we estimate that the critical current at zero field is in excess of ${10}^7$ A/${\mathrm{cm}}^2$.