【摘要】 对Nd2Fe14B／α－Fe纳米复合磁体单个粉末颗粒的磁化过程进行了计算机模拟.在不同条件下得到三种磁滞回线，即：Stoner—Wohlfarth型、细腰型和具有良好矩形度的磁滞回线.并且研究了约化剩磁、内禀矫顽力和最大磁能积随晶粒尺寸a和软磁相含量fm的变化.结果表明，对fm=40％的模型复合磁体．a=25nm时最大磁能积达到最大（BH）max=375kJ／m3，比纯Nd—Fe—B模型磁体的（BH）max=264kJ／m3有明显提高.更多还原

【Abstract】 The computer simulation of magnetization process of a single powder particle of the Nd2Fe14B/α-Fe nanocomposite magnet has been performed. Three types of hysteresis loops have been observed at different conditions: Stoner-Wohlfarth like type, contracted loop and normal hysteresis loop with a good rectangularity. The behavior of the reduced remanence, the intrinsic coercivity and the change of maximum magnetic energy product with the grain size, a,and the content of the soft phase, fm, have been studied. For the model nanocomposite magnetsof fm=40% and the grain size a=25 nm, the optimum value of (BH)max=375 kJ/m3 is attained.It is remarkably enhanced in comparison with the maximum of (BH.)max=264 kJ/m3 of the pure Nd-Fe-B magnet.更多还原