用固相反应法制备了掺杂多晶样品Pr0.2Gd0.3Sr0.5MnO3,用X射线衍射仪(XRD)和超导量子磁强计(SQUID)对其磁性进行了研究.研究结果表明:样品的单相性很好,具有单一正交畸变钙钛矿结构,空间群为Pbnm;掺杂后的样品在低温区表现出铁磁态,整个温度区出现了两个磁转变温度点(TC1=305K,TC2=110K);当温度为110~305K时,样品呈现出铁磁-顺磁混合态.
Polycrystalline sample Pr0.2 Gd0.3 Sr0.5 MnO 3 was prepared by conventional solid state reac-tion method.The structure and magnetic properties have been studied with X-ray diffraction patterns and SQUID.Research shows that the sample is in single phase with the space group Pbnm symmetry.By doping,the sample exhibits ferromagnetic state at low temperature and appears two magnetic transition temperature point in the whole temperature region (T C1 =305 K,T C2 =1 10 K).When the sample is between 1 10 K and 305 K,it is in ferromagnetic-paramagnetic mixed state.