By a News Reporter-Staff News Editor at Journal of Technology -- Fresh data on Magnetics are presented in a new report. According to news reporting out of Beijing, People's Republic of China, by VerticalNews editors, research stated, "In the present study, the demagnetization curves of MnBi/alpha-Fe nanocomposite permanent magnets were calculated by the micro-magnetic finite element method. The effect of volume ratio between magnetically soft alpha-Fe phase and MnBi hard phase on the magnetic properties of magnets was investigated."
Our news journalists obtained a quote from the research from Central Iron and Steel Research Institute, "The sample used in the present simulation was consisted of 91 spherical fourteen faces units of hard phase grains with diameter of 20 nm, and the soft matrix phase with the thickness (t) ranging from 1 to 6 nm. For the isotropic MnBi/alpha-Fe magnets, as t increases, the remanence (B-r) increases first, peaks at 0.855 T for t = 3 nm, then decreases again, while the coercivity (H-ci) drops monotonically from 691 kA/m for t = 1 nm to 94 kA/m for t = 6 nm. The sample with t = 2 nm has the optimal maximum energy product (BH)(max) = 55.15 kJ/m(3). For the anisotropic magnets, the B-r and H-ci exhibit their t-dependent behavior similar to that of the isotropic ones."
According to the news editors, the research concluded: "The optimal values of B-r, H-ci, and (BH)(max) are 1.47 T, 3200 kA/m, and 322 kJ/m(3) when t = 5, 1, and 3 nm, respectively, indicating a good potential of the anisotropic MnBi/alpha-Fe nanocomposite as practical permanent magnets."
For more information on this research see: Investigation of Magnetic Properties of MnBi/alpha-Fe Nanocomposite Permanent Magnets by Micro-Magnetic Simulation. IEEE Transactions on Magnetics, 2013;49(7):3391-3393. IEEE Transactions on Magnetics can be contacted at: Ieee-Inst Electrical Electronics Engineers Inc, 445 Hoes Lane, Piscataway, NJ 08855-4141, USA. (Institute of Electrical and Electronics Engineers - www.ieee.org/; IEEE Transactions on Magnetics - ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=20)
Our news journalists report that additional information may be obtained by contacting Y.Q. Li, Cent Iron & Steel Res Inst, Div Funct Mat, Beijing 100081, People's Republic of China. Additional authors for this research include M. Yue, J.H. Zuo, D.T. Zhang, W.Q. Liu, J.X. Zhang, Z.H. Guo and W. Li.
Keywords for this news article include: Asia, Beijing, Magnetics, People's Republic of China
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