Nanostructured D022-Mn3Ga with high coercivity

被引：21
作者：
El-Gendy, Ahmed A. [1 ,2 ]
Hadjipanayis, George [1 ]
机构：
[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19711 USA
[2] Natl Inst Stand, Nanotecnol & Nanometrol Lab, Giza 12211, Egypt
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2015年 / 48卷 / 12期
关键词：
high coercivity; Mn3Ga; D0(22) phase; nano grains;
D O I：
10.1088/0022-3727/48/12/125001
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The microstructural and magnetic properties of Mn3Ga alloys with D0(22) phase have been investigated. Mn3Ga alloys with a nearly pure D0(22) phase were obtained via a heat treatment of ground arc-melted ingot powders with a cubic structure. X-ray difraction results show the formation of D0(22) after annealing the as-prepared ingot at 673 K for different annealing time intervals. It was found that the annealed samples are magnetically hard with a high H-C of 11 kOe and a saturation magnetization of 20 emu g(-1) at 300 K. Microstructure studies on the annealed powders showed the presence of small grains with size below 30 nm.
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