Very large domain wall velocities in Pt/Co/GdOx and Pt/Co/Gd trilayers with Dzyaloshinskii-Moriya interaction

被引：76

作者：

Thai Ha Pham ^{[1
,2
]}

Vogel, J. ^{[1
,2
]}

Sampaio, J. ^{[3
]}

Vanatka, M. ^{[1
,2
]}

Rojas-Sanchez, J-C ^{[1
,2
]}

Bonfim, M. ^{[4
]}

Chaves, D. S. ^{[1
,2
]}

Choueikani, F. ^{[5
]}

Ohresser, P. ^{[5
]}

Otero, E. ^{[5
]}

Thiaville, A. ^{[3
]}

Pizzini, S. ^{[1
,2
]}

机构：

[1] CNRS, Inst Neel, F-38042 Grenoble, France

[2] Univ Grenoble Alpes, Inst Neel, F-38042 Grenoble, France

[3] Univ Paris Saclay, Univ Paris Sud, CNRS, Phys Solides Lab, F-91405 Orsay, France

[4] Univ Fed Parana, Dept Elect Engn, BR-80060000 Curitiba, Parana, Brazil

[5] Synchrotron Soleil LOrme Merisiers, F-91192 Gif Sur Yvette, France

来源：

EPL | 2016年 / 113卷 / 06期

关键词：

RAY CIRCULAR-DICHROISM; DYNAMICS;

D O I：

10.1209/0295-5075/113/67001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We carried out measurements of domain wall (DW) velocities driven by magneticfield pulses in symmetric Pt/Co/Pt and asymmetric Pt/Co/AlOx, Pt/Co/GdOx and Pt/Co/Gd trilayers with ultrathin Co layers and perpendicular magnetic anisotropy. The maximum observed velocity is much larger in the asymmetric samples, where the interfacial Dzyaloshinskii-Moriya interaction (DMI) stabilises chiral Neel walls. In quantitative agreement with analytical models, in all samples the maximum observed DW speed scales as D/Ms, where D is the strength of the DMI and M-s the spontaneous magnetisation. In Pt/Co/Gd, where the anti-parallel coupling between the magnetic moments of Gd and Co leads to a decrease of the total magnetisation, very large DW speeds (up to 700m/s) are obtained. Copyright (C) EPLA, 2016

引用

页数：6

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