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Concentration-dependent structural transition in the La0.70Sr0.30MnO3−δ system

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Abstract

The crystal structure of anion-deficient La0.70Sr0.30MnO3−δ manganites (δ = 0, 0.10, 0.15, and 0.20) has been studied by powder neutron diffraction at room temperature. The crystal structures of the stoichiometric La0.70Sr0.30MnO3 and anion-deficient La0.70Sr0.30MnO2.90 samples are satisfactorily described by the rhombohedral R \(\bar 3\) c space group. The anion-deficient La0.70Sr0.30MnO2.85 sample separates into two perovskite phases with the R \(\bar 3\) c and I4/mcm space groups. The crystal structure of La0.70Sr0.30MnO2.80 cannot be described by a single perovskite phase in the I4/mcm space group. It is found that the clustering of oxygen vacancies is the cause of structural phase separation at 293 K in anion-deficient La0.70Sr0.30MnO3−δ manganites.

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Authors and Affiliations

  1. Joint Institute of Solid State and Semiconductor Physics, National Academy of Sciences of Belarus, Minsk, 220072, Belarus

    S. V. Trukhanov & I. O. Troyanchuk

  2. Vitebsk State University, Vitebsk, 210036, Belarus

    A. V. Trukhanov

  3. Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia

    I. A. Bobrikov, V. G. Simkin & A. M. Balagurov

Authors
  1. S. V. Trukhanov
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  2. I. O. Troyanchuk
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  3. A. V. Trukhanov
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  4. I. A. Bobrikov
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  5. V. G. Simkin
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  6. A. M. Balagurov
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Additional information

Original Russian Text © S.V. Trukhanov, I.O. Troyanchuk, A.V. Trukhanov, I.A. Bobrikov, V.G. Simkin, A.M. Balagurov, 2006, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2006, Vol. 84, No. 5, pp. 310–314.

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Trukhanov, S.V., Troyanchuk, I.O., Trukhanov, A.V. et al. Concentration-dependent structural transition in the La0.70Sr0.30MnO3−δ system. Jetp Lett. 84, 254–257 (2006). https://doi.org/10.1134/S002136400617005X

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  • DOI: https://doi.org/10.1134/S002136400617005X

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