Dynamics of magnetic domain wall motion after nucleation: dependence on the wall energy.
Dynamics of magnetic domain wall motion after nucleation: dependence on the wall energy.
复制标题
成核后磁畴壁运动的动力学：对壁能量的依赖性。
DOI：
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发表时间：
2006
影响因子：
8.6
通讯作者：
Jurgen Kirschner
中科院分区：
文献类型：
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作者：
Keiki Fukumoto;W. Kuch;J. Vogel;Fabien Romanens;S. Pizzini;Julio Camarero;M. Bonfim;Jurgen Kirschner
通过结合 X 射线磁圆二色性、光电子发射显微镜和频闪泵浦探针技术，研究了 FeNi/Al2O3/Co 三层的 FeNi 层中磁畴壁运动的动力学。在纳秒长的磁场脉冲期间，在高达沃克极限场的粘性区域中观察到磁畴的成核和随后 FeNi 层中磁畴壁运动的扩展。我们将观察到的磁畴扩展延迟归因于磁畴壁能量的影响，磁畴壁能量对抗磁畴扩展，并且在磁畴较小时发挥重要作用。
The dynamics of magnetic domain wall motion in the FeNi layer of a FeNi/Al2O3/Co trilayer has been investigated by a combination of x-ray magnetic circular dichroism, photoelectron emission microscopy, and a stroboscopic pump-probe technique. The nucleation of domains and subsequent expansion by domain wall motion in the FeNi layer during nanosecond-long magnetic field pulses was observed in the viscous regime up to the Walker limit field. We attribute an observed delay of domain expansion to the influence of the domain wall energy that acts against the domain expansion and that plays an important role when domains are small.