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离子注入金红石单晶生成的金属Ni纳米晶的磁学性能研究
引用本文:向霞,祖小涛,张传飞,雷家荣,朱莎,王鲁闵.离子注入金红石单晶生成的金属Ni纳米晶的磁学性能研究[J].强激光与粒子束,2005,17(3):473-476.
作者姓名:向霞  祖小涛  张传飞  雷家荣  朱莎  王鲁闵
作者单位:1. 电子科技大学 应用物理系, 成都 610054; 2. 中国工程物理研究院 核物理与化学研究所,绵阳 621900;3. 美国密西根大学 核工程与放射科学系,安娜堡 48109
基金项目:国家自然科学基金委-中国工程物理研究院联合基金资助课题(10376006)
摘    要: 研究了能量为64keV、注量1×1017cm-2的Ni离子注入金红石TiO2单晶制备的植入金属纳米晶的微观结构和磁学性能。注入层的结构和磁学性能采用透射电子显微分析(TEM)和超导量子干涉磁强计(SQUID)进行分析。结果表明,金红石单晶中有尺寸为3~18nm的金属Ni纳米晶生成,注入区域基体明显非晶化。10K温度下金属Ni纳米晶的矫顽力约为16.8kA·m-1,比Ni块材的矫顽力大。样品的零场冷却/有场冷却(ZFC/FC)曲线表明,金属Ni纳米晶的截止温度约为85K。

关 键 词:离子注入  金红石单晶  Ni纳米晶  显微结构  磁学性能
文章编号:1001-4322(2005)03-0473-04
收稿时间:2004/8/4
修稿时间:2004年8月4日

Magnetic properties of metal Ni nanoparticles prepared by ion implantation in rutile TiO2 single crystals
XIANG Xia,ZU Xiao-tao,ZHANG Chuan-fei,LEI Jia-rong,ZHU sha,WANG Lu-min.Magnetic properties of metal Ni nanoparticles prepared by ion implantation in rutile TiO2 single crystals[J].High Power Laser and Particle Beams,2005,17(3):473-476.
Authors:XIANG Xia  ZU Xiao-tao  ZHANG Chuan-fei  LEI Jia-rong  ZHU sha  WANG Lu-min
Institution:1.Department of Applied Physics, University of Electronic and Technology of China, Chengdu 610054, China; 2.Institute of Nuclear Physics and Chemistry Research, CAEP, Mianyang 621900,China;3. Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI48109, USA
Abstract:keV Ni ion implantation of a dose of 1×10~(17 )cm-2 was performed at room temperature in rutile TiO1 single crystals in which metallic Ni nanoparticles formed directly. Transmission electron microscopy and a superconducting quantum interference device (SQUID) magnetometer were used to characterize the microstructure and magnetic properties of Ni nanoparticles in TiO1. Metal Ni nanopartilces with size ranging 3~18 nm was observed in the near surface of TiO1. A high-resolution electron microscopy (HREM) image indicated the Ni-implanted area had been entirely amorphized. Magnetic measurement indicated that the coercive force of Ni nanoparticles was about 16.8 kA·m-1 at 10 K, which was larger than that of bulk materials of Ni. The blocking temperature obtained from ZFC/FC curves was about 85 K.
Keywords:Ion implantation  Rutile single crystals  Ni nanoparticles  Microstructure  Magnetic properties
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