Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/103050
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dc.contributor.authorSilva, F. G.en
dc.contributor.authorDepeyrot, J.en
dc.contributor.authorRaikher, Y. L.en
dc.contributor.authorStepanov, V. I.en
dc.contributor.authorPoperechny, I. S.en
dc.contributor.authorAquino, R.en
dc.contributor.authorBallon, G.en
dc.contributor.authorGeshev, J.en
dc.contributor.authorDubois, E.en
dc.contributor.authorPerzynski, R.en
dc.date.accessioned2021-08-31T15:07:08Z-
dc.date.available2021-08-31T15:07:08Z-
dc.date.issued2021-
dc.identifier.citationExchange-bias and magnetic anisotropy fields in core–shell ferrite nanoparticles / F. G. Silva, J. Depeyrot, Y. L. Raikher, et al. — DOI 10.1038/s41598-021-84843-0 // Scientific Reports. — 2021. — Vol. 11. — Iss. 1. — 5474.en
dc.identifier.issn20452322-
dc.identifier.otherFinal2
dc.identifier.otherAll Open Access, Gold, Green3
dc.identifier.otherhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85102294166&doi=10.1038%2fs41598-021-84843-0&partnerID=40&md5=d63fff851abd1aa557c9a1ab2f928af5
dc.identifier.otherhttps://www.nature.com/articles/s41598-021-84843-0.pdfm
dc.identifier.urihttp://hdl.handle.net/10995/103050-
dc.description.abstractExchange bias properties of MnFe2O4@γ–Fe2O3 core–shell nanoparticles are investigated. The measured field and temperature dependencies of the magnetization point out a well-ordered ferrimagnetic core surrounded by a layer with spin glass-like arrangement. Quasi-static SQUID magnetization measurements are presented along with high-amplitude pulse ones and are cross-analyzed by comparison against ferromagnetic resonance experiments at 9 GHz. These measurements allow one to discern three types of magnetic anisotropies affecting the dynamics of the magnetic moment of the well-ordered ferrimagnetic NP’s core viz. the easy-axis (uniaxial) anisotropy, the unidirectional exchange-bias anisotropy and the rotatable anisotropy. The uniaxial anisotropy originates from the structural core–shell interface. The unidirectional exchange-bias anisotropy is associated with the spin-coupling at the ferrimagnetic/spin glass-like interface; it is observable only at low temperatures after a field-cooling process. The rotatable anisotropy is caused by partially-pinned spins at the core/shell interface; it manifests itself as an intrinsic field always parallel to the external applied magnetic field. The whole set of experimental results is interpreted in the framework of superparamagnetic theory, i.e., essentially taking into account the effect of thermal fluctuations on the magnetic moment of the particle core. In particular, it is found that the rotatable anisotropy of our system is of a uniaxial type. © 2021, The Author(s).en
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherNature Researchen
dc.rightsinfo:eu-repo/semantics/openAccessen
dc.sourceSci. Rep.2
dc.sourceScientific Reportsen
dc.titleExchange-bias and magnetic anisotropy fields in core–shell ferrite nanoparticlesen
dc.typeArticleen
dc.typeinfo:eu-repo/semantics/articleen
dc.typeinfo:eu-repo/semantics/publishedVersionen
dc.identifier.doi10.1038/s41598-021-84843-0-
dc.identifier.scopus85102294166-
local.contributor.employeeSilva, F.G., Instituto de Física, Universidade de Brasília, Caixa Postal 04455, Brasília, 70919-970, Brazil, Sorbonne Université, CNRS, PHENIX UMR 8234, Paris, 75005, France, Faculdade UnB Planaltina, Universidade de Brasília, Planaltina (DF), 73345-010, Brazil
local.contributor.employeeDepeyrot, J., Instituto de Física, Universidade de Brasília, Caixa Postal 04455, Brasília, 70919-970, Brazil
local.contributor.employeeRaikher, Y.L., Institute of Continuous Media Mechanics, Ural Branch of RAS, Perm, 614068, Russian Federation, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620083, Russian Federation
local.contributor.employeeStepanov, V.I., Institute of Continuous Media Mechanics, Ural Branch of RAS, Perm, 614068, Russian Federation
local.contributor.employeePoperechny, I.S., Institute of Continuous Media Mechanics, Ural Branch of RAS, Perm, 614068, Russian Federation, Department of Phase Transitions Physics, Perm State National Research University, Perm, 614990, Russian Federation
local.contributor.employeeAquino, R., Faculdade UnB Planaltina, Universidade de Brasília, Planaltina (DF), 73345-010, Brazil
local.contributor.employeeBallon, G., CNRS-LNCMI, Toulouse, 31400, France
local.contributor.employeeGeshev, J., Instituto de Fisica, UFRGS, Porto Alegre, RS 91501-970, Brazil
local.contributor.employeeDubois, E., Sorbonne Université, CNRS, PHENIX UMR 8234, Paris, 75005, France
local.contributor.employeePerzynski, R., Sorbonne Université, CNRS, PHENIX UMR 8234, Paris, 75005, France
local.issue1-
local.volume11-
local.contributor.departmentInstituto de Física, Universidade de Brasília, Caixa Postal 04455, Brasília, 70919-970, Brazil
local.contributor.departmentSorbonne Université, CNRS, PHENIX UMR 8234, Paris, 75005, France
local.contributor.departmentFaculdade UnB Planaltina, Universidade de Brasília, Planaltina (DF), 73345-010, Brazil
local.contributor.departmentInstitute of Continuous Media Mechanics, Ural Branch of RAS, Perm, 614068, Russian Federation
local.contributor.departmentInstitute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620083, Russian Federation
local.contributor.departmentDepartment of Phase Transitions Physics, Perm State National Research University, Perm, 614990, Russian Federation
local.contributor.departmentCNRS-LNCMI, Toulouse, 31400, France
local.contributor.departmentInstituto de Fisica, UFRGS, Porto Alegre, RS 91501-970, Brazil
local.identifier.pure21018012-
local.identifier.pure40b4c8fc-2786-4f04-950b-7f78efdd742buuid
local.description.order5474-
local.identifier.eid2-s2.0-85102294166-
local.identifier.pmid33750828-
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