| 纳米Fe3 O4 颗粒的正电子湮没谱学研究 |
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| 引用本文： | 许红霞,郝颖萍,韩荣典,翁惠民,杜淮江,叶邦角.纳米Fe3 O4 颗粒的正电子湮没谱学研究[J].物理学报,2011,60(6):67803-067803. |
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| 作者姓名： | 许红霞 郝颖萍 韩荣典 翁惠民 杜淮江 叶邦角 |
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| 作者单位： | 中国科学技术大学近代物理系,合肥 230026 |
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| 基金项目： | 国家自然科学基金重点项目(批准号:10835006)、国家自然科学基金(批准号:10975133). 教育部"211工程"专项基金和中国科学院知识创新工程重要方向性项目资助的课题. |
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| 摘 要： | 测量了磁性纳米Fe3O4颗粒的X射线衍射谱(XRD)、正电子湮没寿命谱(PALS)和符合多普勒展宽谱(CDBS),研究了不同压力和退火温度对磁性纳米Fe3O4颗粒物相、电子结构、缺陷及电子动量分布等的影响. XRD,PALS,CDBS测量结果表明:纳米Fe3O4颗粒的缺陷浓度随压力的增加而增大,但物相和缺陷类型并未发生变化;磁性纳米Fe3O4<
关键词：
正电子
3O4')" href="#">Fe3O4
寿命谱
多普勒展宽谱
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| 关 键 词： | 正电子 Fe3O4 寿命谱 多普勒展宽谱 |
| 收稿时间： | 2010-07-28 |
Positron annihilation spectroscopy study on the Fe3O4 nanoparticle |
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| Xu Hong-Xia,Hao Ying-Ping,Han Rong-Dian,Weng Hui-Min,Du Huai-Jiang,Ye Bang-Jiao.Positron annihilation spectroscopy study on the Fe3O4 nanoparticle[J].Acta Physica Sinica,2011,60(6):67803-067803. |
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| Authors: | Xu Hong-Xia Hao Ying-Ping Han Rong-Dian Weng Hui-Min Du Huai-Jiang Ye Bang-Jiao |
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| Institution: | Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | The positron annihilation lifetime spectroscopy(PALS),coincidence doppler broadening spectroscopy(CDBS) and x-ray diffraction(XRD) are measured in the Fe3O4.The aim is to ascertain how pressure and annealing temperature influence the properties of Fe3O4 nanoparticles,such as the change of phase,electronic structure,defect and distribution of electronic momenta.The results indicate that the defect concentration of Fe3O4 nanoparticles increases with the increase of pressure,but the phase and defect type do no... |
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| Keywords: | positron Fe3O4 lifetime spectroscopy Doppler broadening spectrum |
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