Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity coupling

Ferrimagnetic insulators with perpendicular magnetic anisotropy exhibit unique properties that offer potential for advanced spintronic devices. One of the challenges in exploiting these materials in spintronics lies in the efficient electrical detection of their magnetization. Herein we report the m...

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Autores: Janus, Weronika, Li, Weibin, Valvidares, Manuel, Avci, Can Onur
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2025
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/385264
Acesso em linha:http://hdl.handle.net/10261/385264
https://api.elsevier.com/content/abstract/scopus_id/85218466833
Access Level:Acceso aberto
Palavra-chave:Giant magnetoresistance
Spintronics
Ferrimagnets
Magnetic insulators
Magnetic multilayers
Spin valves
Magneto-optical Kerr effect
X-ray magnetic circular dichroism
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spelling Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity couplingJanus, WeronikaLi, WeibinValvidares, ManuelAvci, Can OnurGiant magnetoresistanceSpintronicsFerrimagnetsMagnetic insulatorsMagnetic multilayersSpin valvesMagneto-optical Kerr effectX-ray magnetic circular dichroismFerrimagnetic insulators with perpendicular magnetic anisotropy exhibit unique properties that offer potential for advanced spintronic devices. One of the challenges in exploiting these materials in spintronics lies in the efficient electrical detection of their magnetization. Herein we report the magnetoresistive detection of perpendicular magnetization in insulating ferrimagnetic garnets, enhanced through proximity coupling with an adjacent ultrathin ferromagnetic layer. We design and characterize a hybrid spin-valve device consisting of terbium iron garnet (TbIG)/Co/Cu/Tb-Co multilayers where TbIG and Tb-Co are perpendicularly magnetized soft and hard layers, respectively, while Co is in-plane magnetized. We reveal through anomalous Hall effect and x-ray magnetic circular dichroism measurements that the interfacial exchange coupling between TbIG and Co induces a perpendicular magnetization component in the Co layer, which increases the magnetoresistance readout signal by more than 2 orders of magnitude-reaching 0.2%-compared with the reference system without the Co layer. A notable but less pronounced enhancement is observed in the YIG/Co-Fe-B/Cu/Tb-Co spin-valve device compared with the stack without the Co-Fe-B insertion, demonstrating the applicability of the approach to similar structures. Finally, we show that the magnetoresistive output signal can be effectively used to probe the multidomain state of TbIG, opening a path for future insulating spintronic device applications.W.J. and C.O.A. acknowledge funding from the Spanish Ministry of Science and Innovation (MICIU/AEI/10.13039/501100011033) through Grant No. CNS2022-136060 and from the State Investigation Agency through the Severo Ochoa Program for Centers of Excellence in R&D (CEX2023-001263-S). C.O.A. acknowledges funding from the European Research Council under the European Union’s Horizon 2020 research and innovation program (project MAGNEPIC, Grant No. 949052). This work was conducted in part within the MAI-SKY (PID2021-125973OA-I00) project funded by MCIN/AEI/ 10.13039/501100011033/FEDER, UE. We thank J. Alejandro de Sousa for his assistance with the preparation of YIG samples.With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2023-001263-S).Peer reviewedAmerican Physical SocietyMinisterio de Ciencia e Innovación (España)Agencia Estatal de Investigación (España)European Research CouncilJanus, Weronika [0000-0002-9359-9467]Li, Weibin [0009-0003-4037-113X]Valvidares, Manuel [0000-0003-4895-8114]Avci, Can Onur [0000-0003-1226-2342]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/385264https://api.elsevier.com/content/abstract/scopus_id/85218466833reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MICINN/Plan Estatal de investigación Científica y Técnica y de Innovación 2021-2023/CNS2022-136060info:eu-repo/grantAgreement/AEI/Plan Estatal de investigación Científica y Técnica y de Innovación 2021-2023/CEX2023-001263-Sinfo:eu-repo/grantAgreement/EC/H2020/949052info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-125973OA-I00Physical Review Appliedhttp://doi.org/10.1103/PhysRevApplied.23.024042Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3852642026-05-22T06:33:51Z
dc.title.none.fl_str_mv Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity coupling
title Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity coupling
spellingShingle Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity coupling
Janus, Weronika
Giant magnetoresistance
Spintronics
Ferrimagnets
Magnetic insulators
Magnetic multilayers
Spin valves
Magneto-optical Kerr effect
X-ray magnetic circular dichroism
title_short Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity coupling
title_full Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity coupling
title_fullStr Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity coupling
title_full_unstemmed Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity coupling
title_sort Magnetoresistive reading of perpendicular magnetization in ferrimagnetic insulators enhanced through proximity coupling
dc.creator.none.fl_str_mv Janus, Weronika
Li, Weibin
Valvidares, Manuel
Avci, Can Onur
author Janus, Weronika
author_facet Janus, Weronika
Li, Weibin
Valvidares, Manuel
Avci, Can Onur
author_role author
author2 Li, Weibin
Valvidares, Manuel
Avci, Can Onur
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Agencia Estatal de Investigación (España)
European Research Council
Janus, Weronika [0000-0002-9359-9467]
Li, Weibin [0009-0003-4037-113X]
Valvidares, Manuel [0000-0003-4895-8114]
Avci, Can Onur [0000-0003-1226-2342]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Giant magnetoresistance
Spintronics
Ferrimagnets
Magnetic insulators
Magnetic multilayers
Spin valves
Magneto-optical Kerr effect
X-ray magnetic circular dichroism
topic Giant magnetoresistance
Spintronics
Ferrimagnets
Magnetic insulators
Magnetic multilayers
Spin valves
Magneto-optical Kerr effect
X-ray magnetic circular dichroism
description Ferrimagnetic insulators with perpendicular magnetic anisotropy exhibit unique properties that offer potential for advanced spintronic devices. One of the challenges in exploiting these materials in spintronics lies in the efficient electrical detection of their magnetization. Herein we report the magnetoresistive detection of perpendicular magnetization in insulating ferrimagnetic garnets, enhanced through proximity coupling with an adjacent ultrathin ferromagnetic layer. We design and characterize a hybrid spin-valve device consisting of terbium iron garnet (TbIG)/Co/Cu/Tb-Co multilayers where TbIG and Tb-Co are perpendicularly magnetized soft and hard layers, respectively, while Co is in-plane magnetized. We reveal through anomalous Hall effect and x-ray magnetic circular dichroism measurements that the interfacial exchange coupling between TbIG and Co induces a perpendicular magnetization component in the Co layer, which increases the magnetoresistance readout signal by more than 2 orders of magnitude-reaching 0.2%-compared with the reference system without the Co layer. A notable but less pronounced enhancement is observed in the YIG/Co-Fe-B/Cu/Tb-Co spin-valve device compared with the stack without the Co-Fe-B insertion, demonstrating the applicability of the approach to similar structures. Finally, we show that the magnetoresistive output signal can be effectively used to probe the multidomain state of TbIG, opening a path for future insulating spintronic device applications.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/385264
https://api.elsevier.com/content/abstract/scopus_id/85218466833
url http://hdl.handle.net/10261/385264
https://api.elsevier.com/content/abstract/scopus_id/85218466833
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MICINN/Plan Estatal de investigación Científica y Técnica y de Innovación 2021-2023/CNS2022-136060
info:eu-repo/grantAgreement/AEI/Plan Estatal de investigación Científica y Técnica y de Innovación 2021-2023/CEX2023-001263-S
info:eu-repo/grantAgreement/EC/H2020/949052
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-125973OA-I00
Physical Review Applied
http://doi.org/10.1103/PhysRevApplied.23.024042
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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