Effect of Fe doping on the magnetic properties of MnBi alloy

被引：16
作者：
Yang, Yang [1 ,2 ]
Lim, Jung Tae [1 ]
Qian, Hui-Dong [1 ]
Park, Jihoon [1 ]
Kim, Jong-Woo [1 ]
Li, Oi Lun [2 ]
Choi, Chul-Jin [1 ]
机构：
[1] Korea Inst Mat Sci, Powder & Ceram Div, Chang Won 51508, South Korea
[2] Pusan Natl Univ, Sch Mat Sci & Engn, Busan 46241, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 855卷
基金：
新加坡国家研究基金会;
关键词：
MnBi alloy; Rare-earth-free magnets; Fe doping; Magnetic properties; ENERGY PRODUCT; PHASE; COERCIVITY; ZN; TE; SB; CU; TI;
D O I：
10.1016/j.jallcom.2020.157312
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Structure and magnetic properties of Fe-doped MnBi alloy with a range of Fe concentrations were systematically investigated. The coercive field and saturation magnetization (M-s) were drastically changed according to the fabrication methods and Fe contents. The addition of Fe element could enhance the coercivity (H-c) of the MnBi-based alloy, and the increased H-c of 1.76 T was reached in the Mn55Bi45-Fe (15 wt%) ball-milled ribbon. Moreover, a high remanence ratio (M-r/M-s) of 97.0% was achieved in the Mn55Bi45-Fe (7.5 wt%) ball-milled ingot. In addition, as the concentration of Fe increases from 0 to 15 wt%, the Curie temperature (T-c) was increased from 635 to 652 K. This demonstrates that Fe-doped MnBi rare-earth permanent magnets could be a promising candidate for high-temperature applications. The relationship between magnetic properties and intermetallic lattice variations were discussed with precise Rietveld refinement analysis. (C) 2020 Elsevier B.V. All rights reserved.
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页数：7
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