Preparation and Magnetic Properties of MnBi/Co Nanocomposite Magnets

被引：9

作者：

Truong Xuan Nguyen ^{[1
]}

Oanh Kim Thi Vuong ^{[1
]}

Hieu Trung Nguyen ^{[1
]}

Vuong Van Nguyen ^{[1
]}

机构：

[1] Vietnam Acad Sci & Technol, Inst Mat Sci, R 125,Bld A2,18 Hoang Quoc Viet Rd, Hanoi, Vietnam

来源：

JOURNAL OF ELECTRONIC MATERIALS | 2017年 / 46卷 / 06期

关键词：

MnBi alloy; cobalt nanowires (CoNWs); MnBi/Co nanocomposite magnets; hot compaction; magnetic properties; PERMANENT-MAGNETS;

D O I：

10.1007/s11664-017-5345-8

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The method of synthesis and the magnetic properties of MnBi/Co nanocomposite magnets prepared with a combination of the magnetically hard MnBi alloy and semi-hard Co nanowires (CoNWs) have been investigated. The MnBi alloys were produced by arc-melting and temperature-gradient-driven annealing techniques. The CoNWs with high spontaneous magnetization M (s) (125 emu/g) and large aspect ratio alpha (5 A center dot 10) were synthesized by the solvothermal method. The nanocomposite MnBi/Co powder mixtures were cold ball-milled, aligned in an 18-kOe-field and warm-compacted into bulk magnets at 300A degrees C under a uniaxial pressure of 2000 psi for 10 min. The magnetization and coercivity of the nanocomposite magnets were improved due to the intrinsic high magnetization and shape anisotropy of the CoNWs. The energy product, (BH)(max), of the MnBi/Co nanocomposite magnets with 15 wt.% CoNWs reached its highest value of 4.8 MGOe. The simulation of magnetic properties of MnBi/Co magnets is also discussed in detail.

引用

页码：3359 / 3366

页数：8

共 19 条

[1] Thermal stability of MnBi magnetic materials [J].

Cui, J. ;

Choi, J. P. ;

Li, G. ;

Polikarpov, E. ;

Darsell, J. ;

Overman, N. ;

Olszta, M. ;

Schreiber, D. ;

Bowden, M. ;

Droubay, T. ;

Kramer, M. J. ;

Zarkevich, N. A. ;

Wang, L. L. ;

Johnson, D. D. ;

Marinescu, M. ;

Takeuchi, I. ;

Huang, Q. Z. ;

Wu, H. ;

Reeve, H. ;

Vuong, N. V. ;

Liu, J. P. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2014, 26 (06)

[2]

Cullity B. D., 2008, INTRO MAGNETIC MAT, P234

[3] Solution processed MnBi-FeCo magnetic nanocomposites [J].

Dai, Qilin ;

Warsi, Muhammad Asif ;

Xiao, John Q. ;

Ren, Shenqiang .

NANO RESEARCH, 2016, 9 (11) :3222-3228

[4] High Energy Product Developed from Cobalt Nanowires [J].

Gandha, Kinjal ;

Elkins, Kevin ;

Poudyal, Narayan ;

Liu, Xubo ;

Liu, J. Ping .

SCIENTIFIC REPORTS, 2014, 4

[5] Magnetic Materials and Devices for the 21st Century: Stronger, Lighter, and More Energy Efficient [J].

Gutfleisch, Oliver ;

Willard, Matthew A. ;

Bruck, Ekkes ;

Chen, Christina H. ;

Sankar, S. G. ;

Liu, J. Ping .

ADVANCED MATERIALS, 2011, 23 (07) :821-842

[6]

Hieu N. T., 2016, J SCI TECH VAST, V54, P9

[7] THE EXCHANGE-SPRING MAGNET - A NEW MATERIAL PRINCIPLE FOR PERMANENT-MAGNETS [J].

KNELLER, EF ;

HAWIG, R .

IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (04) :3588-3600

[8]

Koa K. Y., 2007, J MAGN MAGN MATER, V310, pe889

[9] Investigation of magnetic properties of MnSi/Co and MnBi/Fe65CO35 nanocomposite permanent magnets by micro-magnetic simulation [J].

Li, Y. Q. ;

Yue, M. ;

Wang, T. ;

Wu, Q. ;

Zhang, D. T. ;

Gao, Y. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2015, 393 :484-489

[10] Effect of α-Fe Content on the Magnetic Properties of MnBi/α-Fe Nanocomposite Permanent Magnets by Micro-magnetic Calculation [J].

Li, Y. Q. ;

Yue, M. ;

Zuo, J. H. ;

Zhang, D. T. ;

Liu, W. Q. ;

Zhang, J. X. ;

Guo, Z. H. ;

Li, W. .

JOURNAL OF MAGNETICS, 2013, 18 (03) :245-249

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