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Structural, thermal, and electrical properties of La0.7Sr0.3Mn1−y FeyO3±δ

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Abstract

The crystal structure, thermal expansion, and electrical conductivity of the doped manganites La0.7Sr0.3Mn1−y FeyO3±δ (y = 0, 0.1, 0.2, 0.3) are studied. The manganites are shown to crystallize in rhombohedral symmetry (sp. gr. \(R\bar 3c\)). Their lattice parameters are determined, and their thermal expansion coefficients are measured in the range 600–1223 K in air. The conductivity of the manganites is measured in broad ranges of oxygen partial pressures (p O 2 = 0.1 to 10−15 MPa) and temperatures (T = 1073–1273 K). The effects of Fe content, temperature, and p O 2 on the dominant defect species and the nature of electrical transport in La0.7Sr0.3Mn1−y FeyO3±δ are analyzed.

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Authors and Affiliations

  1. Ural State University, pr. Lenina 51, Yekaterinburg, 620083, Russia

    A. N. Petrov & E. A. Filonova

  2. Institute of High-Temperature Electrochemistry, Ural Division, Russian Academy of Sciences, ul. S. Kovalevskoi 20, Yekaterinburg, 620219, Russia

    A. N. Demina, K. P. Polovnikova & A. K. Demin

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  1. A. N. Petrov
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  2. A. N. Demina
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  3. K. P. Polovnikova
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  4. A. K. Demin
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  5. E. A. Filonova
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Original Russian Text © A.N. Petrov, A.N. Demina, K.P. Polovnikova, A.K. Demin, E.A. Filonova, 2006, published in Neorganicheskie Materialy, 2006, Vol. 42, No. 4, pp. 472–476.

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Petrov, A.N., Demina, A.N., Polovnikova, K.P. et al. Structural, thermal, and electrical properties of La0.7Sr0.3Mn1−y FeyO3±δ . Inorg Mater 42, 418–422 (2006). https://doi.org/10.1134/S0020168506040145

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  • DOI: https://doi.org/10.1134/S0020168506040145

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