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| Mn位掺杂钙钛矿结构化合物LaSr2Mn2-xNixO7的磁性和电性的研究 | |
| 引用本文： | 石兆辉,冯静,孟健,张密林.Mn位掺杂钙钛矿结构化合物LaSr2Mn2-xNixO7的磁性和电性的研究[J].无机化学学报,2006,22(8):1530-1534. |
| 作者姓名： | 石兆辉 冯静 孟健 张密林 |
| 作者单位： | 1. 哈尔滨工程大学化工学院,哈尔滨,150001 2. 哈尔滨工程大学化工学院,哈尔滨,150001;中科院长春应用化学研究所稀土化学与物理重点实验室,长春,130022 3. 中科院长春应用化学研究所稀土化学与物理重点实验室,长春,130022 |
| 基金项目： | 哈尔滨工程大学校科研和教改项目;高等学校博士学科点专项科研项目 |
| 摘 要： | The effect of Ni substitution for Mn on magnetic and transport properties has been investigated for layered manganese oxides LaSr2Mn2-xNixO7. Nickel doping hampered the canted antiferromagnetic (AFM) exchange at low temperature and their Neel temperature (TN) decreased from 138 K (x=0) to 102 K (x=0.3). Meanwhile, spin glass, charge ordering and metal-insulator transition are suppressed by Ni addition. The resistivity increases obviously with increasing x due to double exchange interaction channel broken by Ni2+ addition. The resistivity of all samples in low temperature range fits to the Mott′s variable rang hopping (VRH) model, while it fits to nearest neighbor hopping of small polarons model in high temperature range. |
| 关 键 词： | 磁阻 钙钛矿 电荷有序 双交换 |
| 文章编号： | 1001-4861(2006)08-1530-05 |
| 收稿时间： | 2006-01-11 |
| 修稿时间： | 2006-05-02 |
Effect of Ni Doping on Magnetic and Electrical Properties in LaSr2Mn2-xNixO7 |
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| SHI Zhao-Hui,FENG Jing,MENG Jian and ZHANG Mi-Lin.Effect of Ni Doping on Magnetic and Electrical Properties in LaSr2Mn2-xNixO7[J].Chinese Journal of Inorganic Chemistry,2006,22(8):1530-1534. | |
| Authors: | SHI Zhao-Hui FENG Jing MENG Jian and ZHANG Mi-Lin |
| Institution: | Harbin Engineering University Chemistry Department, Harbin 150001,Harbin Engineering University Chemistry Department, Harbin 150001;Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022,Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 and Harbin Engineering University Chemistry Department, Harbin 150001 |
| Abstract: | |
| Keywords: | magnetoresistance perovskite charge order double exchange |
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