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| PREPARATION, STRUCTURE AND MAGNETIC PROPERTIES OF SmCo5 NANOPARTICLES AND NANOFLAKES |
| LIU Rongming1,2, YUE Ming1, ZHANG Dongtao1,Liu Weiqiang1, ZHANG Jiuxing1 |
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 |
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Cite this article:
LIU Rongming, YUE Ming, ZHANG Dongtao,Liu Weiqiang, ZHANG Jiuxing. PREPARATION, STRUCTURE AND MAGNETIC PROPERTIES OF SmCo5 NANOPARTICLES AND NANOFLAKES. Acta Metall Sin, 2012, 48(4): 475-479.
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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.
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Received: 17 October 2011
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| Fund: National Natural Science Foundation of China |
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