Please wait a minute...
Chin. Phys. B, 2018, Vol. 27(8): 087502    DOI: 10.1088/1674-1056/27/8/087502
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Micromagnetism simulation on effects of soft phase size on Nd2Fe14B/α–Fe nanocomposite magnet with soft phase imbedded in hard phase

Yu-Qing Li(李玉卿), Ming Yue(岳明), Yi Peng(彭懿), Hong-Guo Zhang(张红国)
College of Materials Science and Engineering, Beijing University of Technology, Beijing, China
Abstract  In this study, micromagnetism simulation by using finite difference method is carried out on the Nd2Fe14B/α-Fe nanocomposite magnet with soft phase imbedded in hard phase. The effects of soft magnetic phase size (S) on the magnetic properties and magnetic reversal modes are systematically analyzed. As S increases from 1 nm to 48 nm, the remanence (Jr) increases, while the coercivity (Hci) decreases, leading to the result that the magnetic energy product[(BH)max] first increases slowly, and then decreases rapidly, peaking at S=24 nm with the (BH)max of 72.9 MGOe (1 MGOe=7.95775 kJ·m-3). Besides, with the increase of S, the coercivity mechanism of the nanocomposite magnet changes from nucleation to pinning. Furthermore, by observing the magnetic moment evolution in demagnetization process, the magnetic reversal of the soft phase in the nanocomposite magnet can be divided into three modes with the increase of S:coherent rotation (S < 3 nm), quasi-coherent rotation (3 nm ≤ qslant S < 36 nm), and the vortex-like rotation (S ≥ 36 nm).
Keywords:  micromagnetism simulation      magnetization dynamics      Nd2Fe14B/α-Fe nanocomposite magnets  
Received:  18 January 2018      Revised:  25 April 2018      Published:  05 August 2018
PACS:  75.78.Cd (Micromagnetic simulations ?)  
  75.78.-n (Magnetization dynamics)  
  75.90.+w (Other topics in magnetic properties and materials)  
Fund: Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. 51331003), the International S & T Cooperation Program of China (Grant No. 2015DFG52020), the General Program of Science and Technology Development Project of Beijing Municipal Education Commission, China (Grant No. KM201710005006), and the State Key Laboratory of Advanced Metals and Materials, China (Grant No. 2015-ZD02).
Corresponding Authors:  Ming Yue     E-mail:  yueming@bjut.edu.cn

Cite this article: 

Yu-Qing Li(李玉卿), Ming Yue(岳明), Yi Peng(彭懿), Hong-Guo Zhang(张红国) Micromagnetism simulation on effects of soft phase size on Nd2Fe14B/α–Fe nanocomposite magnet with soft phase imbedded in hard phase 2018 Chin. Phys. B 27 087502

[1] Skomski R and Coey J M D 1993 Phys. Rev. B 48 15812
[2] Leineweber T and Kronmüller H 1997 J. Magn. Magn. Mater. 176 145
[3] Sabiryanov R F and Jaswal S S 1998 Phys. Rev. B 58 12071
[4] Li Y Q, Yue M, Wang T, Wu Q, Zhang D T and Gao Y 2015 J. Magn. Magn. Mater. 393 484
[5] Cui W B, Takahashi Y K and Hono K 2012 Adv. Mater. 24 6530
[6] Neu V, Sawatzki S, Kopte M, Mickel Ch and Schultz L 2012 IEEE Trans. Magn. 48 3599
[7] Li H, Lou L, Hou F, Guo D, Li W, Li X, Gunderov D V, Sato K and Zhang X Y 2013 Appl. Phys. Lett. 103 142406
[8] Liu Y, Xu L, Wang Q, Li W and Zhang X 2009 Appl. Phys. Lett. 94 172502
[9] Rong C, Zhang Y, Poudyal N, Xiong X, Kramer M J and Liu J P 2010 Appl. Phys. Lett. 96 102513
[10] Li X, Lou L, Song W, Huang G, Hou F, Zhang Q, Zhang H T, Xiao J, Wen B and Zhang X 2017 Adv. Mater. 29 1606430
[11] Li X, Lou L, Song W, Zhang Q, Huang G, Hua Y, Zhang H T, Xiao J, Wen B and Zhang X 2017 Nano Lett. 17 2985
[12] Li H, Li X, Guo D, Lou L, Li W and Zhang X 2016 Nano Lett. 16 5631
[13] Leineweber T and Kronmüller H 1997 Phys. Status Solidi B 201 291
[14] Zhang H W, Rong C B, Zhang S Y and Shen B G 2004 Acta Phys. Sin. 53 4347 (in Chinese)
[15] Li Y Q, Yue M, Wu Q, Wang T, Cheng C X and Chen H X 2015 J. Magn. Magn. Mater. 394 117
[16] Yuan X H, Zhao G P, Yue M, Ye L N, Xia J, Zhang X C and Chang J 2013 J. Magn. Magn. Mater. 343 245
[17] Cui W B, Ma L, Sepehri-Amin H, Takahashi Y K and Hono K 2016 Acta Mater. 107 49
[18] Donahue M J and Porter D G 1999 OOMMF User's Guide, Version 1.0 (Gaithersburg: National Institute of Standards and Technology)
[19] Zhao G P and Wang X L 2006 Phys. Rev. B 74 012409
[20] Kronrniiller H and Goll D 2002 Scr. Mater. 47 551
[21] Zhang H W, Rong C B, Zhang J, Zhang S Y and Shen B G 2002 Phys. Rev. B 66 184436
[22] Zhao G P, Zhou G, Zhang H W, Feng Y P, Xian C W and Zhang Q X 2008 Comp. Mater. Sci. 44 117
[23] Kneller E F and Hawing R 1991 IEEE Trans. Magn. 27 3588
[24] Liu W and Zhang Z 2017 Chin. Phys. B 26 117502
[25] Zhang W, Zhao G P, Yuan X H et al. 2012 J. Magn. Magn. Mater. 324 4231
[1] High frequency magnetic properties of ferromagnetic thin films and magnetization dynamics of coherent precession
Jiang Chang-Jun, Fan Xiao-Long, Xue De-Sheng. Chin. Phys. B, 2015, 24(5): 057504.
No Suggested Reading articles found!