Depth-dependent ferromagnetic spin structure and asymmetric magnetization reversal in exchange-biased Fe/FeMn bilayers

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dc.creatorLuis Eugenio Fernandez Outon
dc.creatorMário da Silva Araújo Filho
dc.creatorJose Domingos Ardisson
dc.creatorWaldemar Augusto de Almeida Macedo
dc.date.accessioned2025-02-23T16:51:32Z
dc.date.accessioned2025-09-09T01:06:53Z
dc.date.available2025-02-23T16:51:32Z
dc.date.issued2020
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.identifier.doihttps://doi.org/10.1016/j.jmmm.2020.166657
dc.identifier.issn0304-8853
dc.identifier.urihttps://hdl.handle.net/1843/80332
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Magnetism and Magnetic Materials
dc.rightsAcesso Restrito
dc.subjectMagnetismo
dc.subjectEspectroscopia de Mossbauer
dc.subject.otherExchange bias
dc.subject.otherFe/FeMn bilayers
dc.subject.otherMagnetization reversal
dc.subject.otherSpin structure
dc.subject.otherDepth-dependent in-field conversion electron
dc.subject.otherMössbauer spectroscopy
dc.titleDepth-dependent ferromagnetic spin structure and asymmetric magnetization reversal in exchange-biased Fe/FeMn bilayers
dc.typeArtigo de periódico
local.citation.epage7
local.citation.spage1
local.citation.volume504
local.description.resumoDepth-dependent spin rotation of the Fe spins upon magnetisation reversal of the ferromagnetic layer in poly- crystalline Fe/FeMn exchange-biased bilayers was investigated by using Fe probe layers and angular hysteresis loops constructed from in-field Fe conversion electron Mössbauer spectroscopy (CEMS) measurements and magnetometry. Our results provide evidence for the formation of an exchange-spring-like domain wall structure inside the ferromagnetic Fe layer during magnetisation reversal along the forward branch of the hysteresis loop (H values varying from positive to negative), and coherent reversal along the recoil branch (H varying from negative to positive). This result implies asymmetric magnetisation reversal for each branch of the hysteresis loop, as indicated by depth-resolved CEMS and vibrating sample magnetometry. These results are relevant for the development of more precise quantitative models for exchange bias in polycrystalline metallic systems with Mn-based antiferromagnets such as those used in spintronic applications.
local.identifier.orcidhttps://orcid.org/0000-0003-3264-337X
local.identifier.orcidhttps://orcid.org/0000-0001-5451-9965
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0304885319339861

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