Continuum of metastable conical states of monoaxial chiral helimagnets

At low temperature and zero applied magnetic field, besides the equilibrium helical state, monoaxial chiral helimagnets have a continuum of helical states differing by the wave number of the modulation. The wave number of these states in units of the equilibrium state wave number is denoted here by...

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Autores: Laliena, V., Osorio, S. A., Bazo, D., Bustingorry, S., Campo, J.
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Recursos:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:127961
Acesso em linha:http://zaguan.unizar.es/record/127961
Access Level:acceso abierto
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spelling Continuum of metastable conical states of monoaxial chiral helimagnetsLaliena, V.Osorio, S. A.Bazo, D.Bustingorry, S.Campo, J.At low temperature and zero applied magnetic field, besides the equilibrium helical state, monoaxial chiral helimagnets have a continuum of helical states differing by the wave number of the modulation. The wave number of these states in units of the equilibrium state wave number is denoted here by p, and accordingly the corresponding states are called the p states. In this work we study in detail the metastability of the p states. The application of an external magnetic field in the direction of the chiral axis has a double effect: On the one hand, it introduces a conical deformation of the p states, and, on the other hand, it destabilizes some of them, shrinking the range of p in which the p states are metastable. If a polarized current is applied along the chiral axis, then the p states reach a steady moving state with a constant velocity proportional to the current intensity. Besides this dynamical effect, the polarized current also induces a conical deformation and reduces the range of stability of the p states. The stability diagram in the plane applied field–applied current intensity has interesting features that, among other things, permits the manipulation of p states by a combination of applied fields and currents. These features can be exploited to devise processes to switch between p states. In particular there are p states with negative p, opening the possibility to helicity switching. The theoretical feasibility of such processes, crucial from the point of view of applications, is shown by micromagnetic simulations. Analogous p states exists in cubic chiral helimagnets and therefore similar effects are expected in those systems.2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://zaguan.unizar.es/record/127961reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/DGA/M4info:eu-repo/grantAgreement/ES/MICINN/AEIinfo:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1279612026-05-29T13:59:51Z
dc.title.none.fl_str_mv Continuum of metastable conical states of monoaxial chiral helimagnets
title Continuum of metastable conical states of monoaxial chiral helimagnets
spellingShingle Continuum of metastable conical states of monoaxial chiral helimagnets
Laliena, V.
title_short Continuum of metastable conical states of monoaxial chiral helimagnets
title_full Continuum of metastable conical states of monoaxial chiral helimagnets
title_fullStr Continuum of metastable conical states of monoaxial chiral helimagnets
title_full_unstemmed Continuum of metastable conical states of monoaxial chiral helimagnets
title_sort Continuum of metastable conical states of monoaxial chiral helimagnets
dc.creator.none.fl_str_mv Laliena, V.
Osorio, S. A.
Bazo, D.
Bustingorry, S.
Campo, J.
author Laliena, V.
author_facet Laliena, V.
Osorio, S. A.
Bazo, D.
Bustingorry, S.
Campo, J.
author_role author
author2 Osorio, S. A.
Bazo, D.
Bustingorry, S.
Campo, J.
author2_role author
author
author
author
description At low temperature and zero applied magnetic field, besides the equilibrium helical state, monoaxial chiral helimagnets have a continuum of helical states differing by the wave number of the modulation. The wave number of these states in units of the equilibrium state wave number is denoted here by p, and accordingly the corresponding states are called the p states. In this work we study in detail the metastability of the p states. The application of an external magnetic field in the direction of the chiral axis has a double effect: On the one hand, it introduces a conical deformation of the p states, and, on the other hand, it destabilizes some of them, shrinking the range of p in which the p states are metastable. If a polarized current is applied along the chiral axis, then the p states reach a steady moving state with a constant velocity proportional to the current intensity. Besides this dynamical effect, the polarized current also induces a conical deformation and reduces the range of stability of the p states. The stability diagram in the plane applied field–applied current intensity has interesting features that, among other things, permits the manipulation of p states by a combination of applied fields and currents. These features can be exploited to devise processes to switch between p states. In particular there are p states with negative p, opening the possibility to helicity switching. The theoretical feasibility of such processes, crucial from the point of view of applications, is shown by micromagnetic simulations. Analogous p states exists in cubic chiral helimagnets and therefore similar effects are expected in those systems.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
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status_str acceptedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/127961
url http://zaguan.unizar.es/record/127961
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/DGA/M4
info:eu-repo/grantAgreement/ES/MICINN/AEI
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
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