We studied the effects of Eu-Ba nonstoichiometry in two series of Eu_{1+x}Ba_{2-x}Cu_3O_{7-δ} and Eu_{1-x}Ba_{2+x}Cu_3O_{7-δ} 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 Eu_2O_3, BaCO_3, and CuO precursors and sintered at 1050°C for 72 h in flowing oxygen. All the samples show the values of critical temperature T_c, volume density ρ, 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.
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.