Magnetic exchange force microscopy

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorIvanov, Aleksei
dc.contributor.authorBessarab, Pavel F.
dc.contributor.authorUzdin, Valery M.
dc.contributor.authorJónsson, Hannes
dc.contributor.departmentUniversity of Iceland
dc.contributor.departmentSt. Petersburg State University
dc.contributor.departmentDepartment of Applied Physics
dc.date.accessioned2021-03-22T07:13:45Z
dc.date.available2021-03-22T07:13:45Z
dc.date.issued2017-09-21
dc.description.abstractIn magnetic exchange force microscopy a magnetic tip is scanned over the surface of a solid and an image representing the exchange interaction recorded. Sudden changes in the image corresponding to magnetization switching can be monitored as a function of the tip-surface distance thereby giving important information about the lifetime of metastable magnetic states and how it is affected by the exchange interaction. Here, theoretical calculations are carried out to study the tip-surface interaction and determine the mechanism and rate of transitions in a magnetic exchange force microscopy experiment, and comparison made with reported experimental data on an Fe cluster interacting with an antiferromagnetic Fe overlayer on a W(001) surface. The activation energy was determined from calculations of minimum energy paths and the pre-exponential factor in the Arrhenius rate expression evaluated from harmonic transition state theory, extended to account for zero modes. A noncollinear extension of the Alexander-Anderson model was used to describe the magnetic properties of an atomic scale representation of the system. The calculations reveal how the tip size, tip-surface distance and magnetic field affect the lifetime of the magnetic states.en
dc.description.versionPeer revieweden
dc.format.extent6
dc.format.extent13320-13325
dc.format.mimetypeapplication/pdf
dc.identifier.citationIvanov , A , Bessarab , P F , Uzdin , V M & Jónsson , H 2017 , ' Magnetic exchange force microscopy : Theoretical analysis of induced magnetization reversals ' , Nanoscale , vol. 9 , no. 35 , pp. 13320-13325 . https://doi.org/10.1039/c7nr04036aen
dc.identifier.doi10.1039/c7nr04036a
dc.identifier.issn2040-3364
dc.identifier.issn2040-3372
dc.identifier.otherPURE UUID: f67dfeb6-9b92-4844-9bf9-f91b88713185
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/f67dfeb6-9b92-4844-9bf9-f91b88713185
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dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/56828671/c7nr04036a.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/103318
dc.identifier.urnURN:NBN:fi:aalto-202103222597
dc.language.isoenen
dc.publisherROYAL SOC CHEMISTRY
dc.relation.ispartofseriesNanoscaleen
dc.relation.ispartofseriesVolume 9, issue 35en
dc.rightsopenAccessen
dc.titleMagnetic exchange force microscopyen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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