| Research on charge ordering and magnetic properties in La0.3Ca0.7Mn1-xWxO3 system |
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| 引用本文： | PENG Zhensheng GUO Huanyin YAN Guoqing MAO Qiang. Research on charge ordering and magnetic properties in La0.3Ca0.7Mn1-xWxO3 system[J]. 稀有金属(英文版), 2007, 26(4): 317-322. DOI: 10.1016/S1001-0521(07)60222-8 |
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| 作者姓名： | PENG Zhensheng GUO Huanyin YAN Guoqing MAO Qiang |
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| 作者单位： | [1]Physics Department, Suzhou College, Suzhou 234000, China [2]Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划);安徽省教育厅自然科学基金;安徽大学校科研和教改项目 |
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| 摘 要： | The perovskite manganite sample La0.3Ca0.7Mn1-xWxO3 （x = 0.08, 0.12） was prepared by the solid-state reaction method. The effect of W doping on the Mn site to La0.3Ca0.7MnO3 charge ordering phase and the changing process of magnetic properties were studied through the measurement of the M-T curve, M-H curves, and ESR curves of the sample. The results showed that when x = 0.08, the charge ordering （CO） phase exists in the system, the transition temperature Tco= 275 K, and the system exhibits PM when T 〉 275 K. The system transforms from spin-disordering paramagnetism to spin-ordering antiferromagnetism in the charge ordering state with the temperature decreasing from 275 K to 230 K. The long-range antiferromagnetism forms and AFM/CO states coexist between 230 K and 5 K. There is a little ferromagnetic component in the AFM/CO background in a low temperature range. When x = 0.12, the CO phase in the system has almost melted completely. There is a little remnant of the CO phase below 150 K. The system exhibits paramagnetism when T 〉 150 K and transforms from paramagnetism to ferromagnetism when T〈 150 K.
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| 关 键 词： | 浓缩物质 物理特性 La0.3Ca0.7Mn1-xWxO3 固态反应 磁性 |
| 收稿时间： | 2006-03-27 |
| 修稿时间： | 2006-03-27 |
Research on charge ordering and magnetic properties in La0.3Ca0.7Mn1-xWxO3 system |
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| PENG Zhensheng,GUO Huanyin,YAN Guoqing,MAO Qiang. Research on charge ordering and magnetic properties in La0.3Ca0.7Mn1-xWxO3 system[J]. Rare Metals, 2007, 26(4): 317-322. DOI: 10.1016/S1001-0521(07)60222-8 |
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| Authors: | PENG Zhensheng GUO Huanyin YAN Guoqing MAO Qiang |
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| Affiliation: | 1. Physics Department, Suzhou College, Suzhou 234000, China;2. Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China;1. Laboratoire de Physique des Matériaux, Université de Sfax, Faculté des Sciences de Sfax, B.P. 1171, 3000 Sfax, Tunisia;2. ITODYS, Université Paris Diderot, CNRS UMR 7086, 15 rue Jean Antoine de Baïf, 75205 Paris, France;3. Center de Recherche en Numérique de Sfax (CNRS), Technopole de Sfax, Cité El Ons, Route de Tunis, Km 9, Sfax, BP 275, Sakiet Ezzit, 3021 Sfax, Tunisia;4. Laboratoire de l’Etat Solide, Faculté des Sciences de Sfax, B.P. 1171, 3000 Sfax, Tunisia;1. Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, Université de Sfax, B.P. 1171, 3000 Sfax, Tunisie;2. Faculty of Physics, Warsaw University of Technology, Koszykowa 7500-662, Warsaw, Poland;3. Department of Chemistry, University of Warsaw, Al. Zwirki i Wigury 101, 02-089, Poland;1. Department of Physics, Shahrood University, Shahrood 36155-316, Iran;2. Department of Physics, Semnan University, Semnan 35195-363, Iran;3. Department of Physics, Isfahan University of Technology, Isfahan 84156-8311, Iran;4. Department of Physics, Brock University, St. Catharines L2S3A1, Canada;1. Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. School of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou 215009, China;3. Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China |
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| Abstract: | The perovskite manganite sample La0.3Ca0.7Mn1-xWxO3 (x=0.08, 0.12) was prepared by the solid-state reaction method. The effect of W doping on the Mn site to La0.3Ca0.7MnO3 charge ordering phase and the changing process of magnetic properties were studied through the measurement of the M-T curve, M-H curves, and ESR curves of the sample. The results showed that when x = 0.08, the charge ordering (CO) phase exists in the system, the transition temperature TCO= 275 K, and the system exhibits PM when T ＞ 275 K. The system transforms from spin-disordering paramagnetism to spin-ordering antiferromagnetism in the charge ordering state with the temperature decreasing from 275 K to 230 K. The long-range antiferromagnetism forms and AFM/CO states coexist between 230 K and 5 K. There is a little ferromagnetic component in the AFM/CO background in a low temperature range. When x = 0.12, the CO phase in the system has almost melted completely. There is a little remnant of the CO phase below 150 K. The system exhibits paramagnetism when T ＞150 K and transforms from paramagnetism to ferromagnetism when T ＜ 150 K. |
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| Keywords: | condensed matter physics charge ordering melting solid-state reaction method magnetic properties |
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