Abstract
((LRE) 0.33Eu 0.33Gd 0.33)Ba 2Cu 3O y bulk superconductor (LRE=Sm, Nd) were textured by the top seeded melt textured growth method in a reduced oxygen atmosphere. Their physical properties and their microstructure were studied. (Sm 0.33Eu 0.33Gd 0.33)Ba 2Cu 3O y textured material exhibited a critical temperature of 94 K and critical current densities at 77 K of 50 000 A cm −2 under self field and 20 000 A cm −2 under 2 T. In the case of (Nd 0.33Eu 0.33Gd 0.33)Ba 2Cu 3O y , an optimal critical temperature of 95 K is reached. Moreover, high critical current density under self field of 60 000 A cm −2 is obtained. This last result has been confirmed by transport measurements. Indeed, critical current densities at 77 K higher than 50 000 A cm −2 have been measured when the applied field was below 2 T.
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