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Structure of Metastable Sr0.8Dy0.2Co3 – δ Phases and Their Electrical and Magnetic Properties

Описание

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1134/S1063776122030037

Аннотация: Abstract: Polycrystalline Sr0.8Dy0.2Co3 – δ complex cobalt oxides with a different amount of oxygen (δ = 0.26, 0.44, 0.46) have been prepared by solid-state synthesis. An increase in oxygen deficiency causes the brownmillerite phase to appear in the perovskite structure, which significantly changes its properties. At δ = 0.46, the Показать полностьюcontent of the brownmillerite phase reaches 38%. A comparative analysis of the magnetic and transport properties of synthesized samples has been carried out. The asymptotic Curie temperature changes sign from positive at δ = 0.26 to negative at δ = 0.46. The magnetoresistance of the sample with δ = 0.46 is negative and exceeds 40% at T = 10 K. The temperature dependence of resistivity is characteristic of semiconductors, and the absolute values for samples at low temperatures differ almost tenfold. © 2022, Pleiades Publishing, Inc.

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Издание

Журнал: Journal of Experimental and Theoretical Physics

Выпуск журнала: Vol. 134, Is. 3

Номера страниц: 290-299

ISSN журнала: 10637761

Издатель: Pleiades journals

Персоны

  • Dudnikov V.A. (Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation)
  • Vereshchagin S.N. (Institute of Chemistry and Chemical Technologies, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation)
  • Solov’ev L.A. (Institute of Chemistry and Chemical Technologies, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation)
  • Gavrilkin S.Y. (Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russian Federation)
  • Tsvetkov A.Y. (Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russian Federation)
  • Sitnikov M.V. (Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation)
  • Orlov Y.S. (Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)

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