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We studied the effects of Eu-Ba nonstoichiometry in two series of Eu1+xBa2-xCu3O7-delta and Eu1-xBa2+xCu3O7-delta samples on transition, structural, and magnetic properties. The samples with the nominal composition of 0 <= x <= 0.07 were synthesized by the solid-state reaction method from Eu2O3, BaCO3, and CuO precursors and sintered at 1050 degrees C for 72 h in flowing oxygen. All the samples show the values of critical temperature T-c, volume density p, and maximum volume magnetization M-max higher than 90 K, 6.3 g cm(-3) and 10(4) Am-1, respectively, except for x = 0.07 samples. The Eu-Ba nonstoichiometry in the two series shows different effects on transport, magnetization hystereses, and intergrain properties of the samples.

Effects of Europium-Barium Nonstoichiometry in EBCO123 Systems on Transition and Magnetization Properties