Magnetic skyrmions in confined geometries: Effect of the magnetic field and the disorder

被引：49

作者：

Juge, Romeo ^{[1
]}

Je, Soong-Geun ^{[1
]}

Chaves, Dayane de Souza ^{[2
]}

Pizzini, Stefania ^{[2
]}

Buda-Prejbeanu, Liliana D. ^{[1
]}

Aballe, Lucia ^{[3
]}

Foerster, Michael ^{[3
]}

Locatelli, Andrea ^{[4
]}

Mentes, Tevfik Onur ^{[4
]}

Sala, Alessandro ^{[4
]}

Maccherozzi, Francesco ^{[5
]}

Dhesi, Sarnjeet S. ^{[5
]}

Auffret, Stephane ^{[1
]}

Gautier, Eric ^{[1
]}

Gaudin, Gilles ^{[1
]}

Vogel, Jan ^{[2
]}

Boulle, Olivier ^{[1
]}

机构：

[1] Univ Grenoble Alpes, CNRS, CEA, Spintec,Grenoble INP,INAC Spintec, F-38000 Grenoble, France

[2] Univ Grenoble Alpes, CNRS, Inst Neel, 25 Ave Martyrs,BP 166, F-38042 Grenoble 9, France

[3] ALBA Synchrotron Light Facil, Carrer Llum 2-26, Cerdanyola Del Valles 08290, Barcelona, Spain

[4] Elettra Sincrotrone SCpA, SS 14 Km 163-5 AREA Sci Pk, I-34149 Trieste, Italy

[5] Diamond Light Source, Didcot OX11 0DE, Oxon, England

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2018年 / 455卷

关键词：

Magnetic skyrmion; XMCD; Disorder; Grain distribution; DYNAMICS; LATTICE;

D O I：

10.1016/j.jmmm.2017.10.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the effect of the lateral confinement and a perpendicular magnetic field on isolated room-temperature magnetic skyrmions in sputtered Pt/Co/MgO nanotracks and nanodots. We show that the skyrmions size can be easily tuned by playing on the lateral dimensions of the nanostructures and by using external magnetic field amplitudes of a few mT, which allow to reach sub-100 nm diameters. Our XMCD-PEEM observations also highlight the important role of the pinning on the skyrmions size and stability under an out-of-plane magnetic field. Micromagnetic simulations reveal that the effect of local pinning can be well accounted for by considering the thin film grain structure with local anisotropy variations and reproduce well the dependence of the skyrmion diameter on the magnetic field and the geometry. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：3 / 8

页数：6

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