We have investigated the electrical transport, magnetotransport and magnetic properties of (1-x) La_0.7Sr_0.3Mn_0.94Co_0.06O₃(LSMCO)/x ZnO (x = 0, 0.04) composite samples to explore the role of the secondary phase. The results of Rietveld refined X-ray diffraction (XRD) data show that the prepared LSMCO sample possesses a rhombohedral structure in the hexagonal lattice and the same reveal that both the compounds in the composite maintain their identities, that is, there is no evidence of reaction between the LSMCO and ZnO. It has been observed that the addition of the ZnO phase into the pure LMSCO sample lowers the metal–insulator transition temperature (T_MI). The electrical resistivity was explored by various theoretical models below & above the metal–insulator transition temperature. In the case of a composite sample (x = 0.04), the high field magnetoresistance has been observed at around room temperature. In the magnetic study, the saturation of magnetization decreases in the case of ZnO added LSMCO sample.

我们研究了（1- x）La _0.7 Sr _0.3 Mn _0.94 Co _0.06 O ₃（LSMCO）/ x ZnO（x的电输运，磁输运和磁性能 = 0，0.04）探索复合样品在次生相中的作用。Rietveld精细X射线衍射（XRD）数据的结果表明，所制备的LSMCO样品在六边形晶格中具有菱面体结构，并且同样表明复合物中的这两种化合物均保持其身份，即没有证据表明LSMCO和ZnO之间的反应。已经观察到，在纯LMSCO样品中添加ZnO相会降低金属-绝缘体的转变温度（T _MI）。在金属-绝缘体转变温度之上和之下，通过各种理论模型探索了电阻率。如果是复合样品（x = 0.04），在室温附近观察到高场磁阻。在磁性研究中，添加ZnO的LSMCO样品的磁化饱和度降低。