| 光谱学与光谱分析 |
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| Establishment and Melting of Charge Ordering in La0.3Ca0.7Mn1-xWxO3 System |
| CAI Zhi-rang1,GUO Huan-yin1,LIU Ning1，2,ZHANG Yu-heng2 |
1. Materials Research Laboratory, Suzhou College，Suzhou 234000, China
2. Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China |
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Abstract Polycrystalline samples of La0.3Ca0.7Mn1-xWxO3 (0.00≤x≤0.15) were prepared by conventional solid-state reaction method. The influence of W doping at Mn site on the magnetic transition of La0.3Ca0.7Mn1-xWxO3 system was studied by the measurements of magnetization-temperature (M-T) curves，magnetization-magnetic intensity(M-H) curves, and ESR spectra. The results show that, with the increase in W doping amount, the magnetic transition of the system exhibits a complicated charge process, when the doping amount is 0.00≤x≤0.08, the charge-ordering(CO) phase exists in the system, AFM/CO states coexist below the transition temperature, and the charge-ordering temperature(Tco) goes up with the increase in W doping content; when x≥0.12, the charge ordering (CO) state of the system weakens and melts, and paramagnetism-ferromagnetism (PM-FM) transition exists at extremely low temperature.
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Received: 2005-12-05
Accepted: 2006-03-20
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Corresponding Authors:
CAI Zhi-rang
E-mail: caizr3680760@163.com
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| Cite this article: |
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CAI Zhi-rang,GUO Huan-yin,LIU Ning, et al. Establishment and Melting of Charge Ordering in La0.3Ca0.7Mn1-xWxO3 System [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(02): 223-227.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2007/V27/I02/223 |
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