Switching a magnetic antivortex core with ultrashort field pulses
Switching a magnetic antivortex core with ultrashort field pulses
复制标题
DOI：
10.1063/1.2838138
复制
发表时间：
2008-04-01
影响因子：
3.2
通讯作者：
Schneider, C. M.
中科院分区：
文献类型：
--
作者：
Gliga, S.;Hertel, R.;Schneider, C. M.
反涡旋是在软磁延伸膜和尺寸超过几微米的图案化元件中发现的与涡旋一起的基本磁性结构。虽然涡旋的动力学行为已经成为许多研究的对象，但反涡旋的磁化动力学还没有被彻底研究。利用微磁学模拟，我们研究了一个孤立的antivortex的动力学响应于亚纳秒外磁场脉冲。我们发现，这些脉冲可以触发反涡旋核心的逆转。这种反转机制与最近在涡核开关中发现的机制是互补的。我们还研究了孤立反涡旋结构中开关过程的稳定性。
Antivortices are fundamental magnetic structures found alongside vortices in soft magnetic extended films and in patterned elements above a few micrometers in size. While the dynamic behavior of vortices has been the object of numerous studies, the magnetization dynamics of antivortices has not been studied as thoroughly. Using micromagnetic simulations, we investigate the dynamics of a single isolated antivortex in response to subnanosecond external field pulses. We find that these pulses can trigger the reversal of the antivortex core. This reversal mechanism is complementary to the one recently found in the vortex core switch. We also investigate the stability of the switching process in the isolated antivortex structure.