Russian Journal of Electrochemistry

, Volume 41, Issue 5, pp 448–454 | Cite as

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

  • G. N. Mazo
  • S. N. Savvin
  • E. V. Mychka
  • Yu. A. Dobrovol’skii
  • L. S. Leonova


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 i0 (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.

Key words

perovskites cuprates hole conduction impedance exchange currents 


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Copyright information

© MAIK “Nauka/Interperiodica” 2005

Authors and Affiliations

  • G. N. Mazo
    • 1
  • S. N. Savvin
    • 1
  • E. V. Mychka
    • 1
  • Yu. A. Dobrovol’skii
    • 2
  • L. S. Leonova
    • 2
  1. 1.Moscow State UniversityMoscowRussia
  2. 2.Institute of Problems of Chemical PhysicsRussian Academy of SciencesChernogolovka, Moscow oblastRussia

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