中文摘要：

运用三维数值模拟计算方法,计算了膜面外不同易轴取向下Nd2Fe14B/Fe65Co35磁性双层膜的磁滞回线、角度分布、成核场、矫顽力和磁能积等,并与实验结果进行了细致比较.计算结果表明：只有当易轴与外场之间的夹角β=0°时,才有明显的成核现象,其成核场和矫顽力均随着软磁相厚度Ls的增加而降低；随着易轴偏角β的增大,剩磁逐渐减小,磁滞回线的方形度降低,从而磁能积减小,在Ls =1 nm,β=0°时磁能积（561.61 kJ/m3）最大.理论计算所得的磁滞回线与实验磁滞回线符合得很好,剩磁和矫顽力的理论值与实验值相差很小.

英文摘要：

The hysteresis loops, angular distribution, nucleation field, coercivity and energy product are calculated by three-dimensional micromagnetic method for Nd2Fe14B/Fe65Co35 bilayers with a deviation of the easy axis, and the results are compared with the experimental results. The results show that obvious nucleation can be observed only when the angleβ between the easy axis and the applied field is equal to 0°, and the nucleation field and the coercivity decrease as the thickness of the soft phase Ls increases. The remanence decreases and the squareness of the hysteresis loop weakens asβ increases, leading to the decrease of the energy product while the largest maximum energy product （561.61 kJ/m3） occurs at Ls =1 nm and β =0° .The shapes of the hysteresis loops, the remanence and the coercivity obtained from calculations and experiments are close to each other.