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An Effective Three-Dimensional Micromagnetic Method and Its Application to Magnetic Tunnel Junctions 下载免费PDF全文
An effective three-dimensional micromagnetic method for predicting equilibrium configuration of magnetization states is presented with conjugate-gradient technique to minimize the total energy, which has a much faster convergence rate than that of the quasi-Newton method. As an application, magnetic tunnel junctions with pinholes in the ultrathin barrier are simulated. The calculated coupling field Hf increases with the pinhole density increase, corresponding to the decrease of barrier thickness. The free layer domain configuration of tunnel junction during the switching process is also demonstrated. 相似文献
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用光学方法测量了O5+离子(4.06~5.31 kev·amu-1)与He原子碰撞引起的200~800nm波长范围的可见光发射谱。分析表明,在O5+与He碰撞中存在着入射离子的单电子俘获激发和双电子俘获激发以及靶原子直接激发过程,并且有较高nl态间的跃迁。经计算得到了各发射谱线的绝对发射截面,并探讨了这些发射截面与入射离子能量之间的依赖关系。 相似文献
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In this paper, we present a micromagnetic design for high field
sensors. The hard layer of the sensors is L1垂直磁化;强磁场传感器;微磁学模拟;高巨磁阻效应 micromagnetic simulation,
giant magnetoresistive, coercivity,
demagnetizing field Project supported by the Nature
Science Foundation of China (Grant No~10404019) and by the Science
and Technology Committee of Shanghai (Grant No~05PJ14090). 2006-09-232006-11-28 In this paper, we present a micromagnetic design for high field
sensors. The hard layer of the sensors is L1垂直磁化;强磁场传感器;微磁学模拟;高巨磁阻效应 micromagnetic simulation,
giant magnetoresistive, coercivity,
demagnetizing field Project supported by the Nature
Science Foundation of China (Grant No~10404019) and by the Science
and Technology Committee of Shanghai (Grant No~05PJ14090). 2006-09-232006-11-28 In this paper, we present a micromagnetic design for high field sensors. The hard layer of the sensors is L10-FePt which is magnetized perpendicularly to film plane and the sense layer is NiFe which is magnetized in the film plane. The magnetization configurations of the hard and sense layers at different external magnetic fields have been simulated. In micromagnetic simulation, the sense field up to one tesla can be reached by using this sensor. We find that whether the sensor has a symmetric or an asymmetric field-sensing window is determined by the coercive field of the hard layer and the demagnetizing field of the sense layer. Corresponding author. E-mail: yaowen@mail.tongji.edu.cn /qk/85823A/200706/24631993.html 7000, 7500, 7570P, 7540M http://cpb.iphy.ac.cn/CN/10.1088/1009-1963/16/6/042 https://cpb.iphy.ac.cn/CN/article/downloadArticleFile.do?attachType=PDF&id=109201 2006-09-23 In this paper, we present a micromagnetic design for high field sensors. The hard layer of the sensors is L10-FePt which is magnetized perpendicularly to film plane and the sense layer is NiFe which is magnetized in the film plane. The magnetization configurations of the hard and sense layers at different external magnetic fields have been simulated. In micromagnetic simulation, the sense field up to one tesla can be reached by using this sensor. We find that whether the sensor has a symmetric or an asymmetric field-sensing window is determined by the coercive field of the hard layer and the demagnetizing field of the sense layer. 相似文献
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安丰稳 《数学年刊A辑(中文版)》2002,(3)
设E是实Banach空间,GLC(E)是E上可逆连续线性场全体.本文证明GLC(E)是含有两个道路连通分支的‖·‖L(E)无界拓扑群,并且把这两个连通分支用Leray-Schauder度表示出来. 相似文献