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M. James, D. Cassidy, D. J. Goossens and R. L. Withers, “The Phase Diagram and Tetragonal Superstructures of the Rare Earth Cobaltate Phases Ln1?xSrxCoO3–δ (Ln = La3+, Pr3+, Nd3+, Sm3+, Gd3+, Y3+, Ho3+, Dy3+, Er3+, Tm3+ and Yb3+),” Journal of Solid State Chemistry, Vol. 177, No. 6, 2004, pp. 1886-1895. doi:10.1016/j.jssc.2004.01.012

has been cited by the following article:

• TITLE: Physical-Properties of Oxygen-Deficient Co-Based Perovskites: Co(Sr1-xYx)O3–δ (0.05 ≤ x ≤ 0.4)

  AUTHORS: Sarkarainadar Balamurugan

  KEYWORDS: Oxygen Deficient Perovskites, CoSrO3–δ, Y-Doping: Room Temperature Ferromagnet, Physical Properties

  JOURNAL NAME: World Journal of Condensed Matter Physics, Vol.1 No.4, November 28, 2011

  ABSTRACT: In this work, the syntheses and characterization of oxygen deficient perovskite cobalt oxides prepared under ambient pressure conditions with different “x” in the Co(Sr1-xYx)O3–δ; 0.05 ≤ x ≤ 0.4 series are reported. The system studied in the present investigation undergoes structural phase transition at room temperature from cubic to tetragonal symmetry. The samples with x ≥ 0.2 show a tetragonal structure with I4/mmm space group, while the samples with 0.05 ≤ x ≤ 0.15 reveal cubic with pm3m group symmetry. Quite similar to Ho-substituted system [J. Appl. Phys. 103, 07B903 (2008)], the present Y-doped magnetization data clearly show the appearance of an enhanced ferromagnetic component at ~350 K for 0.15 ≤ x ≤ 0.225. Unlike the Ho-substituted system, the present narrow compositions behave as hard ferromagnet with quite high coercive field, Hc = 11.02, 12.25 and 14.0 kOe for x = 0.15, 0.2 and 0.225 compositions, respectively at T = 10 K. All the compositions show a semiconducting-like behaviour and some interesting features of temperature dependence of magnetoresistance (MR) are observed. The Co(Sr1-xYx)O3–δ samples seemly to obey variable range hopping conduction model showing a linear ln ρ versus T–1/4 dependence at the temperature range 80 K ≤ T ≤ 300 K.