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中文摘要：
采用水热合成方法，通过调控反应物中Ca^2＋与La^3＋的摩尔比可控合成了钙钛矿结构La1-x-yCaxKyMnO3（0．05≤x≤0．49；0．05≤y≤0．21）系列样品，利用X射线衍射仪、扫描电子显微镜、等离子光谱仪及磁性测量系统对样品的结构、形貌、成分组成和磁学性质进行了研究．结果表明，该水热反应过程为歧化反应，K^＋离子的引入导致了样品中双铁磁相的出现．
英文摘要：
Abstract Perovskite La1-x-yCaxKyMnO3（0.05≤x≤0.49;0.05≤y≤0.21） crystals have been hydrotherma- lly synthesized through controlling the molar ratio of Ca^2＋ to La^3＋ of the reactant solution. The structures, mor- phologies, compositions and magnetic properties of the crystals were studied by X-ray diffractometer （ XRD）, inductively coupled plasma（ICP） analyzer, scanning electron microscope（SEM） and vibrating sample magne- tometer（VSM ）, respectively. The results show that the crystals were prepared from the disproportionation reaction. Two ferromagnetic phases could also be observed, which could be attributed to the doping of K＋ ions.
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