SmCo5纳米颗粒和纳米薄片的制备、结构和磁性能

刘荣明; 岳明; 张东涛; 刘卫强; 张久兴

doi:10.3724/SP.J.1037.2011.00643

金属学报 >

2012 , Vol. 48 >Issue 4: 475 - 479

DOI: https://doi.org/10.3724/SP.J.1037.2011.00643

论文

SmCo₅纳米颗粒和纳米薄片的制备、结构和磁性能

刘荣明 ,
岳明 ,
张东涛 ,
刘卫强 ,
张久兴

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1. 北京工业大学教育部新型功能材料实验室, 北京 100124
2. 中国科学院物理研究所磁学国家重点实验室, 北京 100190

刘荣明, 男, 1982年生, 博士

收稿日期: 2011-10-17

修回日期: 2012-03-27

网络出版日期: 2012-04-11

基金资助

国家自然科学基金资助项目50871003

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PREPARATION, STRUCTURE AND MAGNETIC PROPERTIES OF SmCo₅ NANOPARTICLES AND NANOFLAKES

LIU Rong-Meng ,
YUE Meng ,
ZHANG Dong-Shou ,
LIU Wei-Jiang ,
ZHANG Jiu-Xin

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1. Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100124
2. State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190

Received date: 2011-10-17

Revised date: 2012-03-27

Online published: 2012-04-11

Supported by

National Natural Science Foundation of China

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摘要

采用表面活性剂增强高能球磨技术及颗粒清洗、分级筛选工艺, 制备了具有较高矫顽力、颗粒尺寸分布狭窄的SmCo₅纳米颗粒与纳米薄片, 利用XRD, SEM, TEM, 激光粒径分析(LPSA)和振动样品磁强计(VSM)等手段分别对其相结构、微观形貌、颗粒尺寸分布及磁性能进行了表征. 结果表明, 平均颗粒尺寸分别为9.8和47.5 nm的SmCo₅ 纳米颗粒, 其室温矫顽力分别为6.8×10$⁴和7.3×10⁵ A/m; SmCo₅纳米薄片的平均颗粒尺寸为1.4 μm, 平均厚度为 75 nm, 具有明显的c轴织构和较强的磁各向异性, 其难磁化轴和易磁化轴上的室温矫顽力分别可达5.5×10⁵和1.6× 10⁶ A/m; SmCo₅纳米颗粒和纳米薄片的矫顽力表现出显著的颗粒尺寸依赖性.

关键词： SmCo₅; 纳米颗粒; 纳米薄片; 表面活性剂; 高能球磨; 磁性能

本文引用格式

刘荣明 , 岳明 , 张东涛 , 刘卫强 , 张久兴 . SmCo₅纳米颗粒和纳米薄片的制备、结构和磁性能[J]. 金属学报, 2012 , 48(4) : 475 -479 . DOI: 10.3724/SP.J.1037.2011.00643

Abstract

Surfactant-assisted high energy ball milling technique is a new method of producing magnetic nanoparticles. In this study, permanent magnetic SmCo₅ nanoparticles and nanoflakes with high room-temperature coercivity values and narrow particle size distributions were produced by this technology and a subsequent size-selection process. The SmCo₅ nanoparticles with average particle sizes of 9.8 and 47.5 nm, exhibited room-temperature coercivity values of 6.8×10⁴ and 7.3×10⁵ A/m, respectively, while the SmCo₅ nanoflakes, with the mean particle size of about 1.4 μm and average thickness of 75 nm, showed excellent permanent magnetic properties with an obvious c-axis crystal texture, a strong magnetic anisotropy and high coercivity values of 5.5×10⁵ and 1.6×10⁶ A/m in their easy-axis and hard-axis directions, respectively. The coercivity values of SmCo₅ nanoparticles and nanoflakes exhibited a significant particle size dependance effect.

Key words： SmCo₅; nanoparticle; nanoflake; surfactant; high energy ball milling; magnetic property

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