Investigation of Magnetic Properties of MnBi/$\alpha$-Fe Nanocomposite Permanent Magnets by Micro-Magnetic Simulation

Effect of α-Fe Content on the Magnetic Properties of MnBi/α-Fe Nanocomposite Permanent Magnets by Micro-magnetic Calculation

“…The obtained (BH) max value of 200 kJ/m 3 is lower than the values of 322 kJ/m 3 in the Ref. [5], and the difference of (BH) max comes from the differences between the two calculation models. In detail, the model in the Ref.…”

“…In detail, the model in the Ref. [5] is an ideal two phase mixture model, in which the hard phase grains scattered regular in the soft phase matrix. On the other hand, the calculation model in this paper are irregular grains of soft and hard magnetic phases that were randomly distributed and the soft phases grains are not in direct contact with each other in the model.…”

“…In our previous works [5], the simulation model of MnBi/α-Fe nanocomposite permanent magnets consisting of spherical fourteen faces unit of hard phase grains and the soft matrix phase was made by micro-magnetism finite element model. By means of FEM, the magnetic properties of the magnets were evaluated and the value of maximum ©The Korean Magnetics Society.…”

Investigation on magnetic properties of parallel and perpendicular oriented Nd2Fe14B/Fe65Co35/Nd2Fe14B films by the micro-magnetism finite element method

“…During the past tens of years, much progress has made in both theoretical and experimental work [5][6][7][8][9][10]. Skomski and Coey predicted the giant energy product of 1090 kJ/m 3 based on the Sm 2 Fe 17 N 3 /FeCo multilayers with inplane anisotropy [2]; Kronmüller et al have done a lot of theoretical and experimental work revealing the coercivity mechanism in nanocomposite magnets [11][12][13]; Zhao et al [10,14,15] reported that self-pinning is the dominant coercivity mechanism in nanocomposite magnets; Zhang et al [16,17] calculated the effects of composition, structure, and orientation distribution of magnetic easy axis on the magnetic properties and magnetization reversal of the nanocomposite magnets.…”

Large energy product enhancement in perpendicularly coupled MnBi/CoFe magnetic bilayers

“…The high coercivity of MnBi arises from its magnetocrystalline anisotropy, about 1.6 MJ/m³, and it is very favorable for high-temperature applications, such as in hybrid electric vehicles, but its saturation magnetization is only about M s = 640 kA/m [3,4], limiting the highest achievable energy product to 128 kJ/m 3 . The formation of exchange-coupled hard/soft composites is therefore an attractive path to pursue high-energy products in MnBi-based magnets [5,6].…”