| Influence of annealing treatment on structural and magnetic properties of double perovskite Sr2FeMoO6 |
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| 作者姓名： | 冯晓梅 刘广耀 黄清镇 饶光辉 |
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| 作者单位： | [1]College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China [2]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China [3]NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MA 20899, USA |
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| 摘 要： | The structure, magnetic and electric properties of Sr2FeMoO6 （the as-made sample） and samples after heat treatment were investigated. The nuclear and magnetic structures of the samples were studied using neutron powder diffraction at room temperature. The results show that the tunneling magnetoresistance of polycrystalline Sr2FeMoO6 depends on its annealing temperature. Annealing at 800 ℃ makes the minimal magnetoresistance（MR） elevated, which may be due to the change of the grain size or the modified intergranular connections. Because of the impurity phase of Fe which probably affects the magnetotransport properties is much larger in sample C, so the MR is decreased by postannealing at 1100 ℃. Therefore, further enhancement of the tunneling magnetoresistance （TMR） can be realized by regulating the grain size at appropriate annealing temperature.
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| 关 键 词： | Sr2FeMoO6 钙钛矿 中子粉末衍射 电磁性能 结构 退火 |
| 收稿时间： | 2005-07-05 |
| 修稿时间： | 2005-11-01 |
Influence of annealing treatment on structural and magnetic properties of double perovskite Sr2FeMoO6 |
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| Xiao-mei FENG, Guang-yao LIU, Qing-zhen HUANG,Guang-hui RAO.Influence of annealing treatment on structural and magnetic properties of double perovskite Sr2FeMoO6[J].Transactions of Nonferrous Metals Society of China,2006,16(1):122-126. |
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| Authors: | Xiao-mei FENG Guang-yao LIU Qing-zhen HUANG Guang-hui RAO |
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| Affiliation: | aCollege of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;bBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;cNIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MA 20899, USA |
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| Abstract: | |
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| Keywords: | Sr2FeMoO6 double perovskite neutron powder diffraction magnetoresistance |
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