Structural and magnetic properties of Pr-alloyed MnBi nanostructures

被引：43
|
作者：
Kharel, P. [1 ,2 ]
Shah, V. R. [2 ]
Li, X. Z. [2 ]
Zhang, W. Y. [1 ,2 ]
Skomski, R. [1 ,2 ]
Shield, J. E. [2 ,3 ]
Sellmyer, D. J. [1 ,2 ]
机构：
[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA
[2] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA
[3] Univ Nebraska, Lincoln, NE 68588 USA
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2013年 / 46卷 / 09期
基金：
美国国家科学基金会;
关键词：
PERMANENT-MAGNETS; COERCIVITY; MECHANISM;
D O I：
10.1088/0022-3727/46/9/095003
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The structural and magnetic properties of Pr-alloyed MnBi (short MnBi-Pr) nanostructures with a range of Pr concentrations are investigated. The nanostructures include thin films having Pr concentrations 0, 2, 3, 5 and 9 at.% and melt-spun ribbons having Pr concentrations 0%, 2%, 4% and 6%, respectively. Addition of Pr into the MnBi lattice has produced a significant change in the magnetic properties of these nanostructures including an increase in coercivity and structural phase transition temperature, and a decrease in saturation magnetization and anisotropy energy. The highest value of coercivity measured in the films is 23 kOe and in the ribbons is 5.6 kOe. The observed magnetic properties are explained as the consequences of competing ferromagnetic and antiferromagnetic interactions.
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页数：7
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