Imaging Stray Magnetic Field of Individual Ferromagnetic Nanotubes.
Imaging Stray Magnetic Field of Individual Ferromagnetic Nanotubes.
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单个铁磁纳米管的杂散磁场成像
DOI：
10.1021/acs.nanolett.7b04386
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发表时间：
2018
期刊：
影响因子：
10.8
通讯作者：
M. Poggio
中科院分区：
文献类型：
--
作者：
D. Vasyukov;L Ceccarelli;M. Wyss;B. Gross;A. Schwarb;A. Mehlin;N. Rossi;G. Tütüncüoglu;F. Heimbach;R.R. Zamani;A. Kovács;A. Morral;D. Grundler;M. Poggio
我们使用一个扫描纳米尺度的超导量子干涉装置来映射单个铁磁纳米管（FNTs）产生的杂散磁场作为施加磁场的函数。这些图像是在每个FNT被引导通过磁反转时拍摄的，并与对应于特定磁化配置的微磁模拟进行比较。在垂直于FNT长轴施加的磁场中，它们的磁化似乎通过涡旋状态反转，即具有涡旋端域的配置或在具有单个全局涡旋的足够短的FNT的情况下。样品中的几何缺陷和由此产生的理想化磁化配置的失真影响测得的杂散场图案。
We use a scanning nanometer-scale superconducting quantum interference device to map the stray magnetic field produced by individual ferromagnetic nanotubes (FNTs) as a function of applied magnetic field. The images are taken as each FNT is led through magnetic reversal and are compared with micromagnetic simulations, which correspond to specific magnetization configurations. In magnetic fields applied perpendicular to the FNT long axis, their magnetization appears to reverse through vortex states, that is, configurations with vortex end domains or in the case of a sufficiently short FNT with a single global vortex. Geometrical imperfections in the samples and the resulting distortion of idealized magnetization configurations influence the measured stray-field patterns.
纳米级薄膜结构中的磁畴壁动力学
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
C. Knutson
通讯作者：
C. Knutson