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| Nd0.52Sr0.48MnO3多晶陶瓷的磁性和相分离 | |
| 引用本文： | 刘新典,姜恩永,李养贤,刘晖,李文成,米文博,李志青.Nd0.52Sr0.48MnO3多晶陶瓷的磁性和相分离[J].金属学报,2003,39(12):1243-1246. |
| 作者姓名： | 刘新典 姜恩永 李养贤 刘晖 李文成 米文博 李志青 |
| 作者单位： | 1. 天津大学理学院,天津,300072;天津大学先进陶瓷和加工技术教育部重点实验室,天津,300072 2. 河北工业大学材料科学与工程学院,天津,300130 3. 天津大学理学院,天津,300072 |
| 基金项目： | 国家自然科学基金50072015,50172033和天津市教委科学基金01-20415资助项目 |
| 摘 要： | 实验研究了用Pechini方法制备的Nd0．52Sr0．48MnO3多晶样品的磁性和电子自旋共振特性在Curie温度以上，Nd0.52Sr0．48MnO3表现为顺磁性，这时的电子自旋共振积分谱表现为单一的Lorentz峰；在Neel温度和Curie温度之间，电子自旋共振积分谱由两个Gauss峰组成，表明发生了相分离；在Neel温度以下，我们发现在反铁磁母体中仍有大量的铁磁团簇存在． |
| 关 键 词： | 相分离 庞磁电阻 电子自旋共振 |
| 文章编号： | 0412-1961(2003)12-1243-04 |
| 修稿时间： | 2003年1月23日 |
MAGNETIC PROPERTIES AND PHASE SEPARATION IN Nd0.52Sr0.48MnO3 POLYCRYSTALLINE CERAMIC |
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| LIU Xindian,JIANG Enyong,LI Yangxian,LIU Hui,LI Wencheng Mi Wenbo LI Zhiqing School of Science,Tianjin University,Tianjin , Key Laboratory for Advanced Ceramics and Machining Technology of Ministry Education,Tianjin University,Tianjin , School of Material Science and Engineering,Hebei University of Technology,Tianjin.MAGNETIC PROPERTIES AND PHASE SEPARATION IN Nd0.52Sr0.48MnO3 POLYCRYSTALLINE CERAMIC[J].Acta Metallurgica Sinica,2003,39(12):1243-1246. | |
| Authors: | LIU Xindian JIANG Enyong LI Yangxian LIU Hui LI Wencheng Mi Wenbo LI Zhiqing School of Science Tianjin University Tianjin Key Laboratory for Advanced Ceramics and Machining Technology of Ministry Education Tianjin University Tianjin School of Material Science and Engineering Hebei University of Technology Tianjin |
| Affiliation: | LIU Xindian,JIANG Enyong,LI Yangxian,LIU Hui,LI Wencheng Mi Wenbo LI Zhiqing School of Science,Tianjin University,Tianjin 300072, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry Education,Tianjin University,Tianjin 300072, School of Material Science and Engineering,Hebei University of Technology,Tianjin 300130 |
| Abstract: | Polycrystalline Ndo0.52Sr0.48MnO3 ceramic is prepared by Pechini process and its electron spin resonance spectra, magnetic properties have been investigated experimentally. At temperature above TC (Curie), the compound is paramagnetic and the electron spin spectra consist of a single Lorentzian line centered at about g=2.00. For temperature TN (Neel) < T < TC, the spectra become broad and an additional bump (or shoulder) appears. In this situation, the electron spin spectra can be successfully reproduced by two split lines which shows that the paramagnetic and ferromagnetic phase coexist in Nd0.52Sr0.48MnO3 compound. There are still lots of ferromagnetic clusters mixing in the antiferromagnetic matrix below TN. |
| Keywords: | phase separation colossal magnetoresistance electron spin resonance |
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