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Chin. Phys. B, 2015, Vol. 24(8): 087501    DOI: 10.1088/1674-1056/24/8/087501
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Evolution of structure and magnetic properties in PrCo5 magnet for high energy ball milling in ethanol

Li Zhu-Bai (李柱柏)a, Lan Jian-Ting (兰剑亭)a b, Zhang Xue-Feng (张雪峰)a b, Liu Yan-Li (刘艳丽)a b, Li Yong-Feng (李永峰)a b
a Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;
b School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
Abstract  High energy ball milling (HEBM) is employed to produce nano-sized grains and particles. In this paper, the structure and magnetic properties are investigated in PrCo5 alloy for HEBM in an ethanol milling medium. With the increase of milling time, the grain size reduces and the coercivity increases. For a milling time of less than 30 min, the hysteresis loop of the aligned sample is very different from that of the un-aligned sample and it does not show a large decrease in magnetization slope, indicating a relatively good alignment of easy axes in particles due to the fact that the texture is nearly well preserved. However, when the milling time is further prolonged, the textured structure deteriorates in the powders. Even though exchange coupling exists between grains within the particle, the magnetic properties are exchange-decoupled between particles and the dipolar interaction results in a negative value of δ m in the whole range of the magnetic field.
Keywords:  high energy ball milling      PrCo5 magnets      alignment of easy axes      exchange coupling  
Received:  20 January 2015      Revised:  08 March 2015      Accepted manuscript online: 
PACS:  75.50.Vv (High coercivity materials)  
  75.50.Ww (Permanent magnets)  
  75.50.Tt (Fine-particle systems; nanocrystalline materials)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51461033).
Corresponding Authors:  Zhang Xue-Feng     E-mail:  xuefeng056@163.com

Cite this article: 

Li Zhu-Bai (李柱柏), Lan Jian-Ting (兰剑亭), Zhang Xue-Feng (张雪峰), Liu Yan-Li (刘艳丽), Li Yong-Feng (李永峰) Evolution of structure and magnetic properties in PrCo5 magnet for high energy ball milling in ethanol 2015 Chin. Phys. B 24 087501

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