| Fe离子注入ZnO生成超顺磁纳米颗粒 |
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| 引用本文： | 潘峰,丁斌峰,法涛,成枫锋,周生强,姚淑德.Fe离子注入ZnO生成超顺磁纳米颗粒[J].物理学报,2011,60(10):108501-108501. |
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| 作者姓名： | 潘峰 丁斌峰 法涛 成枫锋 周生强 姚淑德 |
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| 作者单位： | 1. 北京大学核物理与核技术国家重点实验室,北京 100871;
2. 陕西理工学院物理系,汉中 723001;
3. 廊坊师范学院物理与电子信息学院, 廊坊 065000 |
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| 基金项目： | 国家重点基础研究发展计划(批准号: 2010CB832904)和国家自然科学基金(批准号: 10875007,11005005)资助的课题. |
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| 摘 要： | 过渡族元素掺杂ZnO生成稀磁半导体, 成为近期国际材料科学研究的热点. 在本文中, 研究Fe离子注入ZnO单晶的结构和磁性变化, 目标是建立磁性和结构的对应关系, 澄清铁磁性的来源. 采用卢瑟福背散射/沟道技术 (RBS/Channelling)、同步辐射X射线衍射 (SR-XRD)和超导量子干涉仪 (SQUID), 研究注入温度和退火对样品的晶格损伤、结构及磁性的影响. 研究表明: 样品注入区损伤随注入温度升高而降低; 低温253 K注入样品中, SR-XRD未检测到新相, Fe离子分布于Zn位, ZnO (0002) 峰右侧肩峰可能属于Zn1-xFexO, 5 K下测试样品不具有铁磁性; 623 K注入和823 K真空退火 (253 K注入) 样品中形成α和γ相金属Fe, 5 K下样品具有明显的剩磁和矫顽力, 零场冷却和场冷却 (ZFC/FC) 曲线和300 K下的磁滞回线显示纳米Fe颗粒具有超顺磁性. Fe离子注入ZnO的磁性源于第二相α-Fe和γ-Fe.
关键词：
离子注入
ZnO
同步辐射X射线衍射
超顺磁性
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| 关 键 词： | 离子注入 ZnO 同步辐射X射线衍射 超顺磁性 |
| 收稿时间： | 2011-03-21 |
| 修稿时间： | 5/3/2011 12:00:00 AM |
Superparamagnetic nanoparticles formed in Fe-implanted ZnO |
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| Pan Feng,Ding Bin-Feng,Fa Tao,Cheng Feng-Feng,Zhou Sheng-Qiang and Yao Shu-De.Superparamagnetic nanoparticles formed in Fe-implanted ZnO[J].Acta Physica Sinica,2011,60(10):108501-108501. |
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| Authors: | Pan Feng Ding Bin-Feng Fa Tao Cheng Feng-Feng Zhou Sheng-Qiang and Yao Shu-De |
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| Institution: | State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;Department of Physics, Shaanxi University of Technology, Hanzhong 723001, China;State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;Department of Physics and Electronic Information, Langfang Teachers College, Langfang 065000, China;State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China |
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| Abstract: | Due to its potential application to diluted magnetic oxides,transition metal doped ZnO has been under intensive investigation.We present a correlation between the structural and the magnetic properties of Fe implanted ZnO bulk crystals.Crystalline damage recovery,structural and magnetic properties are studied by Rutherford backscattering spectrometry and channelling(RBS/C),synchrotron radiation X-ray diffraction(SR-XRD),and superconducting quantum interference device magnetometer(SQUID),respectively.The 623... |
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| Keywords: | ion implantation ZnO SR-XRD superparamagnetism |
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