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

doi:10.1088/1674-1056/24/5/057501

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 La_0.7Sr_0.1Ag_xMnO_3-δ perovskite manganites

侯雪^a, 纪登辉^{a b}, 齐伟华^a, 唐贵德^a, 李壮志^a

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 La_0.7Sr_0.1Ag_xMnO_3-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

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/Abstract

摘要： Ag-doped manganite powder samples, La_0.7Sr_0.1Ag_xMnO_3-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, T_C, 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, La_0.7Sr_0.1Ag_xMnO_3-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, T_C, 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)

侯雪, 纪登辉, 齐伟华, 唐贵德, 李壮志. Structural and magnetic properties of La_0.7Sr_0.1Ag_xMnO_3-δ perovskite manganites[J]. 中国物理B, 2015, 24(5): 57501-057501.

Hou Xue (侯雪), Ji Deng-Hui (纪登辉), Qi Wei-Hua (齐伟华), Tang Gui-De (唐贵德), Li Zhuang-Zhi (李壮志). Structural and magnetic properties of La_0.7Sr_0.1Ag_xMnO_3-δ perovskite manganites[J]. Chin. Phys. B, 2015, 24(5): 57501-057501.

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Structural and magnetic properties of La_0.7Sr_0.1Ag_xMnO_3-δ perovskite manganites

Structural and magnetic properties of La_0.7Sr_0.1Ag_xMnO_3-δ perovskite manganites

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