Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: A 57Fe Mossbauer Study of Fe-Doping Effect on La1-xCaxMn0.94Fe0.06O3 Compounds
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 822-824)
Author(s): Jun-xiong Gao, Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074; 2Laboratory of nuclear Analytical Techniques,Institute of High energy Physics, Chinese Academy of Sciences, Beijing 100049; 3Department of Materi
Yun-bo Wang, Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074; 2Laboratory of nuclear Analytical Techniques,Institute of High energy Physics, Chinese Academy of Sciences, Beijing 100049; 3Department of Materi
Wen-li Zhou, Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074; 2Laboratory of nuclear Analytical Techniques,Institute of High energy Physics, Chinese Academy of Sciences, Beijing 100049; 3Department of Materi
Long Wei, Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074; 2Laboratory of nuclear Analytical Techniques,Institute of High energy Physics, Chinese Academy of Sciences, Beijing 100049; 3Department of Materi
Guo-hui Cao, Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074; 2Laboratory of nuclear Analytical Techniques,Institute of High energy Physics, Chinese Academy of Sciences, Beijing 100049; 3Department of Materi
Abstract: The ceramic samples with nominal composition of La1-xCaxMn0.94Fe0.06O3 (0.05 ≤ x ≤ 0.80) were prepared by the ordinary solid state reaction method. The X-ray diffraction pattern for all the samples revealed single phase material, and there is a transition for the structure from orthorhombic to cubic type as x > 0.2. The room temperature Mossbauer spectra was fitted with one paramagnetic doublet, which indicate that the Fe3+ in high spin state occupy the Mn site with octahedral coordination. The quadruple splitting decrease linearly with the Ca content increasing until x = 0.3. Moreover, the isomer shift in the range of 0.05 ? x ? 0.4 is higher than that of 0.5 ≤ x ≤ 0.8. The variations of these parameters reveal the Ca-doping effect on local structure of Fe+3(Mn+3)as an aspect. The results are performed and discussed.
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