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

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

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.

Keywords: perovskite manganite Curie temperature cation vacancy crystal structure

Received: 10 October 2014
Revised: 15 December 2014
Accepted manuscript online:

PACS:	75.47.Lx	(Magnetic oxides)
	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)

Fund: 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).

Corresponding Authors: Qi Wei-Hua
E-mail: qiweihua1028@126.com

About author: 75.47.Lx; 75.50.Dd; 74.25.Ha; 91.60.Ed

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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 2015 Chin. Phys. B 24 057501

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

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