Current-induced domain wall motion and magnetization dynamics in CoFeB/Cu/Co nanostripes

被引：5
作者：
Uhlir, V. [1 ,2 ,3 ]
Vogel, J. [1 ,2 ]
Rougemaille, N. [1 ,2 ]
Fruchart, O. [1 ,2 ]
Ishaque, Z. [1 ,2 ]
Cros, V. [4 ]
Camarero, J. [5 ,6 ]
Cezar, J. C. [7 ]
Sirotti, F. [8 ]
Pizzini, S. [1 ,2 ]
机构：
[1] CNRS, Inst Neel, F-38042 Grenoble 9, France
[2] CNRS, UJF, F-38042 Grenoble 9, France
[3] Brno Univ Technol, Inst Engn Phys, Brno 61669, Czech Republic
[4] CNRS Thales, Unite Mixte Phys, F-91767 Palaiseau, France
[5] Inst Nicolas Cabrera, Dept Fis Mat Condensada, Madrid 28049, Spain
[6] IMDEA Nanociencia, Madrid 28049, Spain
[7] ESRF, F-38043 Grenoble, France
[8] Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2012年 / 24卷 / 02期
关键词：
D O I：
10.1088/0953-8984/24/2/024213
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Current-induced domain wall motion and magnetization dynamics in the CoFeB layer of CoFeB/Cu/Co nanostripes were studied using photoemission electron microscopy combined with x-ray magnetic circular dichroism (XMCD-PEEM). Quasi-static measurements show that current-induced domain wall motion in the CoFeB layer is similar to the one observed in the NiFe layer of NiFe/Cu/Co trilayers, although the threshold current densities for domain wall depinning are lower. Time-resolved XMCD-PEEM measurements are used as an efficient probe of domain wall depinning statistics. They also reveal that, during the application of current pulses, the CoFeB magnetization rotates in the direction transverse to the nanostripe. The corresponding tilt angles have been quantified and compared to analytical and micromagnetic calculations, highlighting the influence of magnetostatic interactions between the two magnetic layers on the magnetization rotation.
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页数：9
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