CAJ | 학술논문

用固相反应法制备了掺杂多晶样品 Pr0.2 Gd0.3 Sr0.5 MnO 3,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(TC 1=305 K,TC2=110 K)；当温度为110~305 K 时,样品呈现出铁磁-顺磁混合态.
용고상반응법제비료참잡다정양품 Pr0.2 Gd0.3 Sr0.5 MnO 3,용 X 사선연사의(XRD)화초도양자자강계(SQUID)대기자성진행료연구.연구결과표명：양품적단상성흔호,구유단일정교기변개태광결구,공간군위Pbnm；참잡후적양품재저온구표현출철자태,정개온도구출현료량개자전변온도점(TC 1=305 K,TC2=110 K)；당온도위110~305 K 시,양품정현출철자-순자혼합태.
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.