Abstract Ca1+xCu3-xTi4O12, x = 0.0, 0.1, 0.2, quadruple perovskite system has been investigated by means of energy dispersive analysis of X-rays, powder X-ray diffractometry, scanning electron microscopy, dc magnetization in zero-field and field-cooled modes (M(T) curves) and isothermal magnetization against magnetic field (M(H) loop) plots. The stoichiometric samples possess a single-phase crystal structure and coarse-grained microstructure. The cation distributions reveal that substituted Ca2+ ions have a strong preference for Aʹʹ - site. The M(T) curves of pristine composition exhibit reversible thermomagnetic characteristic with classic antiferromagnetic transition at TN ~ 25 K. On Ca2+ substitution, the compositions (x = 0.1 and 0.2) show coexistence of weak ferromagnetism and antiferromagnetism for T

中文翻译：

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Ca1+Cu3-Ti4O12 (x = 0.0-0.2)钙钛矿的阳离子分布和磁序演化研究

摘要 通过 X 射线能量色散分析、粉末 X 射线衍射、扫描电子显微镜、零场和场直流磁化等方法研究了 Ca1+xCu3-xTi4O12, x = 0.0, 0.1, 0.2, 四重钙钛矿体系。 - 冷却模式（M(T) 曲线）和等温磁化强度对磁场（M(H) 回路）图。化学计量样品具有单相晶体结构和粗晶显微组织。阳离子分布表明，取代的Ca2+离子对Aʹʹ-位点有强烈的偏好。原始成分的 M(T) 曲线表现出可逆的热磁特性，在 TN ~ 25 K 处具有经典的反铁磁转变。在 Ca2+ 取代时，成分 (x = 0.1 和 0.2) 显示 T 的弱铁磁性和反铁磁性共存