FeCoCu竹节状纳米线的畴壁钉扎
Domain wall pinning in FeCoCu bamboo-like nanowires
摘要：
利用磁力显微镜（MFM）研究了FeCoCu单根纳米线中周期性直径调制对畴壁扩展的钉扎效应。首次从MFM图像中推断出一种主要的双畴磁位形，其特征是两个轴向磁化方向相反的近单畴态之间的自旋反转。互补的微磁学模拟证实了涡旋介导的磁化反转过程。一个改进的MFM成像程序下的可变外加磁场，使我们能够观察到亚稳态的传播畴壁钉扎在某些位置与扩大的直径。此外，它表明，在一些非典型的纳米线具有较高的矫顽场，它是可能的控制的外部磁场的钉扎畴壁的位置。
英文摘要：
The pinning effect of the periodic diameter modulations on the domain wall propagation in FeCoCu individual nanowires is determined by Magnetic Force Microscopy, MFM. A main bistable magnetic configuration is firstly concluded from MFM images characterized by the spin reversal between two nearly single domain states with opposite axial magnetization. Complementary micromagnetic simulations confirm a vortex mediated magnetization reversal process. A refined MFM imaging procedure under variable applied field allows us to observe metastable magnetic states where the propagating domain wall is pinned at certain positions with enlarged diameter. Moreover, it is demonstrated that in some atypical nanowires with higher coercive field it is possible to control the position of the pinned domain walls by an external magnetic field.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
