中国物理B ›› 2015, Vol. 24 ›› Issue (5): 57501-057501.doi: 10.1088/1674-1056/24/5/057501
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
侯雪a, 纪登辉a b, 齐伟华a, 唐贵德a, 李壮志a
Hou Xue (侯雪)a, Ji Deng-Hui (纪登辉)a b, Qi Wei-Hua (齐伟华)a, Tang Gui-De (唐贵德)a, Li Zhuang-Zhi (李壮志)a
摘要: Ag-doped manganite powder samples, La0.7Sr0.1AgxMnO3-δ (x = 0.00, 0.025, 0.05, 0.075, and 0.10) were synthesized using the sol–gel method. X-ray diffraction patterns indicated that the samples had two phases with the R3c perovskite being the dominant phase and Mn3O4 being the second phase. X-ray energy dispersive spectra indicated that the ratio of Ag to La was very close to that of the nominal composition in the samples. The specific saturation magnetizations at 300 K increased from 32.0 A·m2/kg when x = 0.00 to 46.8 A·m2/kg when x = 0.10. The Curie temperature, TC, of the samples increased from 310 K when x = 0.00 to 328 K when x = 0.10. Because the atomic concentration ratios of La, Sr, and Mn in the five samples were all the same and only the Ag concentration changed, the variations of the specific saturation magnetizations at 300 K and the Curie temperatures suggested that the Ag cations have been doped into the A sites of the perovskite phase in the samples.
中图分类号: (Magnetic oxides)