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

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Cigáň A., Maňka J., Kopčok M., Polovková J., Jurdák P., Koňakovský A.

Acta Physica Polonica A

2008

vol. 113

issue 1

219-222

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.

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1 Acta Physica Polonica A

1 2008

1 Cigáň A.

1 Jurdák P.

1 Kopčok M.

1 Koňakovský A.

1 Maňka J.

1 Polovková J.

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