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Conductivity of Lanthanum-Strontium Cuprate LaSrCuO4−δ and Ionic Reversibility of Relevant Electrodes

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Abstract

A single-phase sample of the LaSrCuO3.58 composition is prepared by solid-state synthesis at 1473 K in air. The conductivity of LaSrCuO3.58 is measured by a four-probe method at direct current in the temperature range from 298 to 1173 K at oxygen partial pressures from 28 to 2.1 × 104 Pa. Heating samples above ∼670 K is shown to result in a changeover of the conduction type from semiconducting (p-type) to metallic. Exchange currents at the LSCuO/YSZ interface are measured by impedance spectroscopy. The measurements are carried out in high-density symmetrical cells LSCuO|YSZ|LSCuO, fabricated by hot pressing of powders under a pressure of 3.5 × 109 Pa at 773 K. Experimental exchange currents i 0 (varying from 10−3 to 10−4 A/cm2 in the temperature interval from 800 to 1173 K) are comparable with such of materials based of lanthanum-strontium manganite.

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Authors and Affiliations

  1. Moscow State University, Vorob’evy Gory 1, Moscow, 119992, Russia

    G. N. Mazo, S. N. Savvin & E. V. Mychka

  2. Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika N.N. Semenova 1, Chernogolovka, Moscow oblast, 142432, Russia

    Yu. A. Dobrovol’skii & L. S. Leonova

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  1. G. N. Mazo
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  2. S. N. Savvin
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  3. E. V. Mychka
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  4. Yu. A. Dobrovol’skii
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  5. L. S. Leonova
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Correspondence to L. S. Leonova.

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__________

Translated from Elektrokhimiya, Vol. 41, No. 5, 2005, pp. 516–522.

Original Russian Text Copyright © 2005 by Mazo, Savvin, Mychka, Dobrovol’skii, Leonova.

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Mazo, G.N., Savvin, S.N., Mychka, E.V. et al. Conductivity of Lanthanum-Strontium Cuprate LaSrCuO4−δ and Ionic Reversibility of Relevant Electrodes. Russ J Electrochem 41, 448–454 (2005). https://doi.org/10.1007/s11175-005-0089-9

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  • DOI: https://doi.org/10.1007/s11175-005-0089-9

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