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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Analytical solution for precessional magnetization switching in exchange biased high perpendicular anisotropy nanostructures
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Analytical solution for precessional magnetization switching in exchange biased high perpendicular anisotropy nanostructures

机译:交换偏置高垂直各向异性纳米结构中进动磁化转换的解析解

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摘要

We analyse the precessional magnetization switching of high perpendicular anisotropy nanostructures biased with an in-plane exchange field. Our calculation is made in the limit of non-damped macrospin ferromagnetic media. From the Landau-Lifshitz-Gilbert equation, we first derive the magnetic trajectories. Then, we give the analytical expressions of the time-dependent magnetization, the precession frequency and the switching time for any in-plane applied field pulse orientation. We show that the exchange bias field decreases significantly both the switching time and the reversal field. We find that the switching time is slightly dependent on the applied field orientation. Typical switching times less than 100 ps are predicted for a Co/Pt multilayer.
机译:我们分析了偏高的垂直各向异性纳米结构在面内交换场的进动磁化转换。我们的计算是在非阻尼宏自旋铁磁介质的极限下进行的。根据Landau-Lifshitz-Gilbert方程,我们首先得出磁轨。然后,我们给出了随时间变化的磁化强度,进动频率和任何面内施加磁场脉冲取向的切换时间的解析表达式。我们表明,交换偏置场显着降低了切换时间和反转场。我们发现切换时间在某种程度上取决于所施加的磁场方向。预测Co / Pt多层膜的典型开关时间小于100 ps。

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