Magneto-ionic suppression of magnetic vortices

Magneto-ionics refers to the non-volatile control of the magnetic properties of materials by voltage-driven ion migration. This phenomenon constitutes one of the most important magnetoelectric mechanisms and, so far, it has been employed to modify the magnetic easy axis of thin films, their coercivi...

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Autores principales:	Yu Chen, Aliona Nicolenco, Pau Molet, Agustin Mihi, Eva Pellicer, Jordi Sort
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	magnetoelectric magneto-ionics vortex voltage control of magnetism Materials of engineering and construction. Mechanics of materials TA401-492 Biotechnology TP248.13-248.65
Acceso en línea:	https://doaj.org/article/b348b7b06da340e492af25eabf237a1c
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id	oai:doaj.org-article:b348b7b06da340e492af25eabf237a1c
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spelling	oai:doaj.org-article:b348b7b06da340e492af25eabf237a1c2021-11-11T14:23:41ZMagneto-ionic suppression of magnetic vortices1468-69961878-551410.1080/14686996.2021.1988830https://doaj.org/article/b348b7b06da340e492af25eabf237a1c2021-12-01T00:00:00Zhttp://dx.doi.org/10.1080/14686996.2021.1988830https://doaj.org/toc/1468-6996https://doaj.org/toc/1878-5514Magneto-ionics refers to the non-volatile control of the magnetic properties of materials by voltage-driven ion migration. This phenomenon constitutes one of the most important magnetoelectric mechanisms and, so far, it has been employed to modify the magnetic easy axis of thin films, their coercivity or their net magnetization. Herein, a novel magneto-ionic effect is demonstrated: the transition from vortex to coherent rotation states, caused by voltage-induced ion motion, in arrays of patterned nanopillars. Electrolyte-gated Co/GdOx bilayered nanopillars are chosen as a model system. Electron microscopy observations reveal that, upon voltage application, oxygen ions diffuse from GdOx to Co, resulting in the development of paramagnetic oxide phases (CoOx) along sporadic diffusion channels. This breaks up the initial magnetization configuration of the ferromagnetic pillars (i.e. vortex states) and leads to the formation of small ferromagnetic nanoclusters, embedded in the CoOx matrix, which behave as single-domain nanoparticles. As a result, a decrease in the net magnetic moment is observed, together with a drastic change in the shape of the hysteresis loop. Micromagnetic simulations are used to interpret these findings. These results pave the way towards a new potential application of magnetoelectricity: the magneto-ionic control of magnetic vortex states.Yu ChenAliona NicolencoPau MoletAgustin MihiEva PellicerJordi SortTaylor & Francis Grouparticlemagnetoelectricmagneto-ionicsvortexvoltage control of magnetismMaterials of engineering and construction. Mechanics of materialsTA401-492BiotechnologyTP248.13-248.65ENScience and Technology of Advanced Materials, Vol 22, Iss 1, Pp 972-984 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	magnetoelectric magneto-ionics vortex voltage control of magnetism Materials of engineering and construction. Mechanics of materials TA401-492 Biotechnology TP248.13-248.65
spellingShingle	magnetoelectric magneto-ionics vortex voltage control of magnetism Materials of engineering and construction. Mechanics of materials TA401-492 Biotechnology TP248.13-248.65 Yu Chen Aliona Nicolenco Pau Molet Agustin Mihi Eva Pellicer Jordi Sort Magneto-ionic suppression of magnetic vortices
description	Magneto-ionics refers to the non-volatile control of the magnetic properties of materials by voltage-driven ion migration. This phenomenon constitutes one of the most important magnetoelectric mechanisms and, so far, it has been employed to modify the magnetic easy axis of thin films, their coercivity or their net magnetization. Herein, a novel magneto-ionic effect is demonstrated: the transition from vortex to coherent rotation states, caused by voltage-induced ion motion, in arrays of patterned nanopillars. Electrolyte-gated Co/GdOx bilayered nanopillars are chosen as a model system. Electron microscopy observations reveal that, upon voltage application, oxygen ions diffuse from GdOx to Co, resulting in the development of paramagnetic oxide phases (CoOx) along sporadic diffusion channels. This breaks up the initial magnetization configuration of the ferromagnetic pillars (i.e. vortex states) and leads to the formation of small ferromagnetic nanoclusters, embedded in the CoOx matrix, which behave as single-domain nanoparticles. As a result, a decrease in the net magnetic moment is observed, together with a drastic change in the shape of the hysteresis loop. Micromagnetic simulations are used to interpret these findings. These results pave the way towards a new potential application of magnetoelectricity: the magneto-ionic control of magnetic vortex states.
format	article
author	Yu Chen Aliona Nicolenco Pau Molet Agustin Mihi Eva Pellicer Jordi Sort
author_facet	Yu Chen Aliona Nicolenco Pau Molet Agustin Mihi Eva Pellicer Jordi Sort
author_sort	Yu Chen
title	Magneto-ionic suppression of magnetic vortices
title_short	Magneto-ionic suppression of magnetic vortices
title_full	Magneto-ionic suppression of magnetic vortices
title_fullStr	Magneto-ionic suppression of magnetic vortices
title_full_unstemmed	Magneto-ionic suppression of magnetic vortices
title_sort	magneto-ionic suppression of magnetic vortices
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/b348b7b06da340e492af25eabf237a1c
work_keys_str_mv	AT yuchen magnetoionicsuppressionofmagneticvortices AT alionanicolenco magnetoionicsuppressionofmagneticvortices AT paumolet magnetoionicsuppressionofmagneticvortices AT agustinmihi magnetoionicsuppressionofmagneticvortices AT evapellicer magnetoionicsuppressionofmagneticvortices AT jordisort magnetoionicsuppressionofmagneticvortices
_version_	1718438975830491136

Magneto-ionic suppression of magnetic vortices

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