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

Structural and magnetic properties of La0.7Sr0.1AgxMnO3-δ perovskite manganites

侯雪a, 纪登辉a b, 齐伟华a, 唐贵德a, 李壮志a   

  1. a Hebei Advanced Thin Film Laboratory, Department of Physics, Hebei Normal University, Shijiazhuang 050024, China;
    b Department of Physics and Electronic Science, Liupanshui Normal University, Liupanshui 553004, China
  • 收稿日期:2014-10-10 修回日期:2014-12-15 出版日期:2015-05-05 发布日期:2015-05-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. NSF-11174069), the Natural Science Foundation of Hebei Province, China (Grant No. E2011205083), the Key Item Science Foundation of Hebei Province, China (Grant No. 10965125D), the Key Item Science Foundation of the Education Department of Hebei Province, China (Grant No. ZD2010129), and the Young Scholar Science Foundation of the Education Department of Hebei Province, China (Grant No. QN20131008).

Structural and magnetic properties of La0.7Sr0.1AgxMnO3-δ perovskite manganites

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   

  1. a Hebei Advanced Thin Film Laboratory, Department of Physics, Hebei Normal University, Shijiazhuang 050024, China;
    b Department of Physics and Electronic Science, Liupanshui Normal University, Liupanshui 553004, China
  • Received:2014-10-10 Revised:2014-12-15 Online:2015-05-05 Published:2015-05-05
  • Contact: Qi Wei-Hua E-mail:qiweihua1028@126.com
  • About author:75.47.Lx; 75.50.Dd; 74.25.Ha; 91.60.Ed
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. NSF-11174069), the Natural Science Foundation of Hebei Province, China (Grant No. E2011205083), the Key Item Science Foundation of Hebei Province, China (Grant No. 10965125D), the Key Item Science Foundation of the Education Department of Hebei Province, China (Grant No. ZD2010129), and the Young Scholar Science Foundation of the Education Department of Hebei Province, China (Grant No. QN20131008).

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.

关键词: perovskite manganite, Curie temperature, cation vacancy, crystal structure

Abstract: 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.

Key words: perovskite manganite, Curie temperature, cation vacancy, crystal structure

中图分类号:  (Magnetic oxides)

  • 75.47.Lx
75.50.Dd (Nonmetallic ferromagnetic materials) 74.25.Ha (Magnetic properties including vortex structures and related phenomena) 91.60.Ed (Crystal structure and defects, microstructure)