Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets

Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets

We examine the combined effects of interlayer exchange coupling (IEC) and the interfacial Dzyaloshinskii-Moriya Interaction (DMI) on the structure of magnetic domain walls in fully compensated synthetic anti-ferromagnets (SAFs). Ir-based SAFs with ferromagnetic (FM) layers based on [Pt/(Co/Ni)M]N we...

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Main Authors: Nisrit Pandey, Maxwell Li, Marc De Graef, Vincent Sokalski
Format: Article
Language:English
Published: AIP Publishing LLC 2020-01-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5130411
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spelling doaj-258a65a0e057492b8ebc0d95837171102020-11-25T00:17:59ZengAIP Publishing LLCAIP Advances2158-32262020-01-01101015233015233-410.1063/1.5130411Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnetsNisrit Pandey0Maxwell Li1Marc De Graef2Vincent Sokalski3Department of Materials Science & Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USADepartment of Materials Science & Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USADepartment of Materials Science & Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USADepartment of Materials Science & Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USAWe examine the combined effects of interlayer exchange coupling (IEC) and the interfacial Dzyaloshinskii-Moriya Interaction (DMI) on the structure of magnetic domain walls in fully compensated synthetic anti-ferromagnets (SAFs). Ir-based SAFs with ferromagnetic (FM) layers based on [Pt/(Co/Ni)M]N were characterized by Lorentz transmission electron microscopy (LTEM). The multi-layer design of the individual ferromagnetic layers enables control of the interfacial Dzyaloshinskii-Moriya interaction (via ‘M’) and, in turn, the structure and chirality of domain walls (DWs). We compare the Fresnel-mode LTEM images in SAF designs with only a change in the purported strength of the DMI. The existence of anti-ferromagnetically coupled Dzyaloshinskii domain walls (DWs) in a high DMI SAF is confirmed through application of in-situ perpendicular magnetic field and sample tilt. This conclusion is based on a unique set of conditions required to observe contrast in Fresnel-mode LTEM, which we outline in this document.http://dx.doi.org/10.1063/1.5130411
collection DOAJ
language English
format Article
sources DOAJ
author Nisrit Pandey
Maxwell Li
Marc De Graef
Vincent Sokalski
spellingShingle Nisrit Pandey
Maxwell Li
Marc De Graef
Vincent Sokalski
Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets
AIP Advances
author_facet Nisrit Pandey
Maxwell Li
Marc De Graef
Vincent Sokalski
author_sort Nisrit Pandey
title Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets
title_short Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets
title_full Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets
title_fullStr Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets
title_full_unstemmed Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets
title_sort stabilization of coupled dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2020-01-01
description We examine the combined effects of interlayer exchange coupling (IEC) and the interfacial Dzyaloshinskii-Moriya Interaction (DMI) on the structure of magnetic domain walls in fully compensated synthetic anti-ferromagnets (SAFs). Ir-based SAFs with ferromagnetic (FM) layers based on [Pt/(Co/Ni)M]N were characterized by Lorentz transmission electron microscopy (LTEM). The multi-layer design of the individual ferromagnetic layers enables control of the interfacial Dzyaloshinskii-Moriya interaction (via ‘M’) and, in turn, the structure and chirality of domain walls (DWs). We compare the Fresnel-mode LTEM images in SAF designs with only a change in the purported strength of the DMI. The existence of anti-ferromagnetically coupled Dzyaloshinskii domain walls (DWs) in a high DMI SAF is confirmed through application of in-situ perpendicular magnetic field and sample tilt. This conclusion is based on a unique set of conditions required to observe contrast in Fresnel-mode LTEM, which we outline in this document.
url http://dx.doi.org/10.1063/1.5130411
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AT maxwellli stabilizationofcoupleddzyaloshinskiidomainwallsinfullycompensatedsyntheticantiferromagnets
AT marcdegraef stabilizationofcoupleddzyaloshinskiidomainwallsinfullycompensatedsyntheticantiferromagnets
AT vincentsokalski stabilizationofcoupleddzyaloshinskiidomainwallsinfullycompensatedsyntheticantiferromagnets
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