| Original Articles |
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Influence of Fe in the local Structure of Perovskite Compound La2/3Cal/3Fel-xMnxO3 |
| WE1 Long1;WANG Yun-Bo1;WANG Hui-Yao1;YUE Yong1;WANG Tian-Min1,2;ZHANG Tian-Bao1;CAO Guo-Hui1,3 |
| 1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100080
2School of Sciences, Beijing University of Aeronautics and Astronautics, Beijing 100083
3Department of Metal Physics, Beijing University of Science and Technology, Beijing 100083
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| Cite this article: |
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WE Long, WANG Yun-Bo, WANG Hui-Yao et al 2000 Chin. Phys. Lett. 17 446-447 |
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Abstract The ceramic samples with nominal composition of La2/3Cal/3Mnl-xFexO3 (0.01 ≤ x ≤ 0.20) were prepared by solid state reaction method. The effect of Fe doping on the Mn site was measured by the positron annihilation technique and Mössbauer spectroscopy. Upon doping, no appreciable structure change and electronic structure change in Mn-O plane were observed in the series of compounds. The Mössbauer parameters show that the iron probe has stable 3+ valance with the high spin state in all samples. Moreover, by examining the shape of the spectra, the tendency can be found that the isomer shift and quadruploe splitting increase with the increasing Fe+3 content. This phenomenon shows the local lattice distortion and the localization of d-electrons with the increasing Fe-doping content.
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| Keywords:
75.60.Ej
78.70.Bj
76.80.+j
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Published: 01 June 2000
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| PACS: |
75.60.Ej
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(Magnetization curves, hysteresis, Barkhausen and related effects)
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78.70.Bj
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(Positron annihilation)
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76.80.+j
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