We perform micromagnetic simulations on the switching of magnetic vortex core by using spin-polarized currents through a three-nanocontact geometry. Our simulation results show that the current combination with an app...We perform micromagnetic simulations on the switching of magnetic vortex core by using spin-polarized currents through a three-nanocontact geometry. Our simulation results show that the current combination with an appropriate current flow direction destroys the symmetry of the total effective energy of the system so that the vortex core can be easier to excite,resulting in less critical current density and a faster switching process. Besides its fundamental significance, our findings provide an additional route to incorporating magnetic vortex phenomena into data storage devices.展开更多
计算机的开关电源需要使用共模电感来抑制共模的电磁干扰,同时需要考虑对差模的电磁干扰抑制,为了获得良好的干扰抑制效果,需要设置两级或两级以上滤波电路,这必然带来开关电源电路成本,降低电源的功率密度。提出一种采用纳米非晶跑道...计算机的开关电源需要使用共模电感来抑制共模的电磁干扰,同时需要考虑对差模的电磁干扰抑制,为了获得良好的干扰抑制效果,需要设置两级或两级以上滤波电路,这必然带来开关电源电路成本,降低电源的功率密度。提出一种采用纳米非晶跑道形磁芯共差模电感器,以常用500 W PC电源,只用一级共模滤波器就能满足电磁兼容(EMC)要求。展开更多
基金supported by the China Postdoctoral Science Foundation(Grant No.2013M541286)the Science and Technology Planning Project of Jilin Province,China(Grant Nos.20140520109JH and 20150414003GH)the “Twelfth Five year” Scientific and Technological Research Project of Department of Education of Jilin Province,China
文摘We perform micromagnetic simulations on the switching of magnetic vortex core by using spin-polarized currents through a three-nanocontact geometry. Our simulation results show that the current combination with an appropriate current flow direction destroys the symmetry of the total effective energy of the system so that the vortex core can be easier to excite,resulting in less critical current density and a faster switching process. Besides its fundamental significance, our findings provide an additional route to incorporating magnetic vortex phenomena into data storage devices.
文摘计算机的开关电源需要使用共模电感来抑制共模的电磁干扰,同时需要考虑对差模的电磁干扰抑制,为了获得良好的干扰抑制效果,需要设置两级或两级以上滤波电路,这必然带来开关电源电路成本,降低电源的功率密度。提出一种采用纳米非晶跑道形磁芯共差模电感器,以常用500 W PC电源,只用一级共模滤波器就能满足电磁兼容(EMC)要求。