【摘要】 在高温高压条件下，利用自主设计加工的Walker型高压组件合成新型铜基稀土过渡金属钙钛矿La1–x Ndx Cu O3（0≤x≤1）。结构精修结果表明：La1–x Ndx Cu O3（0≤x≤0.4）具有菱方结构，空间群为■；当0.5≤x≤0.7时，该体系表现出■菱方结构与Pnma正交结构共存的混合相；进一步增加Nd的掺杂比例，当0.8≤x≤1时样品具有单一的Pnma正交结构。获得了La_1–x Nd_x Cu O₃（0≤x≤1）的完整结构相图，为深入研究稀土-3d过渡金属氧化物的磁性、金属-绝缘体相变等物性演化规律提供了新的材料选项。更多还原

【Abstract】 The copper-based rare-earth perovskites La_1–xNd_xCuO₃（0≤x≤1） have been synthesized in the two-stage Walker-type high-pressure apparatus.The refined crystal structure results revealed that La_1–xNd_xCuO₃（0≤x≤0.4） adopts a rhombohedral structure with the space group ■.When 0.5≤x≤0.7,a mixed phase with both ■R3c rhombohedral and Pnma orthorhombic structures was observed in the system.With a further increase in Nd³⁺ doping,the system exhibits a single Pnma orthorhombic phase when x=0.8,0.9 and 1.A comprehensive structural phase diagram of La_1–xNd_xCuO₃（0≤x≤1） was established in this study,providing a new material platform for investigating the magnetic properties,metal-insulator transitions,and other physical property evolutions in rare-earth 3d transition metal oxides.更多还原