Fig. 7: Micromagnetic simulations. | NPG Asia Materials

Fig. 7: Micromagnetic simulations.

From: Unveiling the origin of the large coercivity in (Nd, Dy)-Fe-B sintered magnets

Fig. 7: Micromagnetic simulations.The alternative text for this image may have been generated using AI.

a 3D model for the micromagnetic simulations. b Simulated angular dependences of the coercivity with a given magnetization of the intergranular phase (μ0MsIGP) = 0.8 T for Nd2Fe14B and (Nd0.8Dy0.2)2Fe14B magnets. c Simulated angular dependences of the coercivity for the Nd2Fe14B magnet with μ0MsIGP = 0.8 T and the (Nd0.8Dy0.2)2Fe14B magnet with μ0MsIGP = 0.6 T, which agree well with the experimentally measured Hc(θ) curve shown in Fig. 2b. The angular dependences of the coercivity for the Kondorsky (1/cos(θ)) and Stoner–Wohlfarth models ((cos2/3(θ) + sin2/3(θ))–3/2) are plotted for comparison, and the gray dotted line represents Hc(θ)/Hc(0°) = 1.

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