摘要
我们学习一个单个领域的岁差的切换，有由 micromagnetic 模拟的形状 anisotropy 的单轴的磁性的磁盘。结果证明磁性的切换能被更小的磁场脉搏比在一个圆形的磁盘与它对容易的轴垂直的长 semiaxis 在一个椭圆形的磁盘驾驶。形状 anisotropy 能改变精力障碍的高度，因此，我们可以获得由在热稳定性条件下面调节磁盘的方面比率切换的最佳的快磁化。椭圆形、圆形的磁盘的切换的行为详细被学习。仅仅适当地选择脉搏振幅和持续时间能认识到，这被发现快岁差的切换。[从作者抽象]
We study the precessional switching of a single domain, uniaxial magnetic disk with shape anisotropy by the micromagnetic simulation. The results show that magnetic switching can be driven by a smaller magnetic field pulse in an elliptic disk with its long semiaxis perpendicular to the easy axis than in a circular disk. The shape anisotropy can change the height of the energy barrier, thus we may obtain an optimal fast magnetization switching by tuning the aspect ratio of the disk under the thermal stability condition. The switching behavior of the elliptic and circular disks is studied in detail It is found that only properly choosing the pulse amplitude and duration can realize the fast precessional switching.
