Cobaltites with the general formula ACoO₃ exhibit a wide variety of physical properties. Cobaltite Pr_0.5Ca_0.5CoO₃ exhibits a metal–insulator transition accompanied by a structural shift with a delocalized intermediate spin state (\(t_{2g}^{5} e_{g}^{1}\)) or \(S^{*}\) at high temperature. In this work, Pr_0.5−xSm_xCa_0.5CoO_3−δ (x = 0.02, 0.04, 0.06, and 0.08) perovskites were synthesized by the standard solid-state method. Rietveld analysis for experimental X-ray diffraction (XRD) patterns showed that the samples crystallize in an orthorhombic structure with space group Pnma (62). Zero field cooling-field cooling (ZFC–FC) magnetization curves, at a temperature range from 50 to 300 K, show paramagnetic behaviors in each of the Sm doped samples. The analysis of magnetization curves suggests that the samples exhibit a short-range ferromagnetic phase at 50 K and a Co low spin (LS) state in the paramagnetic regime.

通式为ACoO _3的钴矿具有多种物理性质。钴铁矿Pr _0.5 Ca _0.5 CoO ₃表现出金属-绝缘体转变，并伴随着结构移位和局部自旋的自旋态（\（t_ {2g} ^ {5} e_ {g} ^ {1} \））或\（S ^ {*} \）在高温下。在这项工作中，Pr _{0.5− x} Sm _x Ca _0.5 CoO _{3− δ}（x 通过标准的固态方法合成钙钛矿= 0.02、0.04、0.06和0.08）。Rietveld对实验X射线衍射（XRD）图谱的分析表明，样品结晶为具有Pnma空间群的正交结构（62）。在50至300 K的温度范围内，零场冷却场冷却（ZFC-FC）磁化曲线显示了每个Sm掺杂样品中的顺磁行为。磁化曲线的分析表明，样品在顺磁状态下在50 K处表现出短程铁磁相，并处于Co low spin（LS）状态。