Synthesis and characterization of Sr_1−xLn_xCoO_3−δ, Ln=Y, Sm–Tm, 0.1x0.5

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• 作者：Istomin ; S.Ya. ; Drozhzhin ; O.A. ; Svensson ; G. ; Antipov ; E.V.
• 关键词：Perovskites ; Complex cobalt oxides ; X-ray diffraction ; Electron microscopy
• 刊名：Solid State Sciences
• 出版年：2004
• 出版时间：June, 2004
• 年：2004
• 卷：6
• 期：6
• 页码：539-546
• 全文大小：506 K

文摘

Different perovskite-related phases have been found in an X-ray powder diffraction (XRD) and transmission electron microscopy study of the Sr_1−xLn_xCoO_3−δ, Ln=Y, Sm–Tm, 0.1≤x≤0.5 systems. For the compositions Sr_0.7Ho_0.3CoO_3−δ; Sr_1−xEu_xCoO_3−δ, 0.3≤x≤0.4; Sr_1−xGd_xCoO_3−δ, 0.3≤x≤0.5; Sr_1−xTb_xCoO_3−δ, 0.3≤x≤0.4; Sr_1−xDy_xCoO_3−δ, 0.2≤x≤0.3 the formation of phases isostructural with the recently discovered perovskite related Sr_0.7Y_0.3CoO_2.62, aalign=center border=0 SRC=/images/glyphs/BQ4.GIF>2×a_per, calign=center border=0 SRC=/images/glyphs/BQ4.GIF>4×a_per (a_per perovskite subcell) was observed. The crystal and magnetic structures of Sr_0.7Dy_0.3CoO_2.62 were refined using neutron diffraction data (I4/mmm, a=7.6280(8), c=15.338(2) Å, R_p