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Phase-change magnetic memory: Rewritable ferromagnetism by laser quenching of chemical disorder in Fe60Al40 alloy

2018-08-17Journal article Restricted access
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dc.contributor.authorPolushkin, Nikolay I.
dc.contributor.authorOliveira, Vitor
dc.contributor.authorVilar, R.
dc.contributor.authorHe, M.
dc.contributor.authorShugaev, Maxim
dc.contributor.authorZhigilei, Leonid
dc.date.accessioned2018-10-09T08:54:41Z
dc.date.available2018-10-09T08:54:41Z
dc.date.issued2018-08-17
dc.description.abstractHigh-intensity laser irradiation can effectively couple to practically all kinds of materials, causing modification of their physical properties due to laser-induced phase transformations. This gives rise to a broad field of laser micro- and nanofabrication with its various technological applications. We demonstrate that, in a 40-nm-thick film of Fe60Al40 alloy, a short laser pulse is capable of (re)writing the ferromagnetism observed at room temperature (RT). The energy of the pulse generating a ferromagnetic region has to be sufficiently high to induce melting of the Fe60Al40 layer, while the ferromagnetic state can be erased by various kinds of lower-intensity thermal treatment. This cycling of RT ferromagnetism can be explained in terms of the chemical order (B2)-disorder (A2) phase transition in the Fe60Al40 crystal lattice, which is affected by laser-induced melting and rapid resolidification. Our finding has implications for the development of a magnetic memory technology that would use the reversibility of the modulus of the magnetization vector instead of its direction. This promises to circumvent the problem of the superparamagnetic limit for magnetic data storage density.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPOLUSHKIN, N. I; [et al] – Phase-change magnetic memory: rewritable ferromagnetism by laser quenching of chemical disorder in Fe60Al40 alloy. Physical Review Applied. ISSN 2331-7019. Vol. 10, N.º 2 (2018), pp. 024023-1- 024023-10pt_PT
dc.identifier.doi10.1103/PhysRevApplied.10.024023pt_PT
dc.identifier.issn2331-7019
dc.identifier.urihttp://hdl.handle.net/10400.21/8895
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAmerican Physical Societypt_PT
dc.relationNational Science Foundation (NSF) - Grant N.º CMMI-1436775pt_PT
dc.relationEngineering spin textures for magnetoelectronics
dc.subjectHigh-intensity laser irradiationpt_PT
dc.subjectFerromagnetismpt_PT
dc.subjectMagnetic data storage densitypt_PT
dc.titlePhase-change magnetic memory: Rewritable ferromagnetism by laser quenching of chemical disorder in Fe60Al40 alloypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleEngineering spin textures for magnetoelectronics
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FFIS%2F121588%2F2010/PT
oaire.citation.endPage024023-10pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage024023-1pt_PT
oaire.citation.titlePhysical Review Appliedpt_PT
oaire.citation.volume10pt_PT
oaire.fundingStream3599-PPCDT
person.familyNamePolushkin
person.familyNameOliveira
person.familyNameShugaev
person.familyNameZhigilei
person.givenNameNikolay
person.givenNameVitor
person.givenNameMaxim
person.givenNameLeonid
person.identifier.ciencia-idDA1C-25BD-5974
person.identifier.orcid0000-0003-4614-1020
person.identifier.orcid0000-0002-1757-4524
person.identifier.orcid0000-0002-1841-3677
person.identifier.orcid0000-0002-1549-7086
person.identifier.ridA-2480-2011
person.identifier.ridA-3058-2009
person.identifier.scopus-author-id7003751414
person.identifier.scopus-author-id7006105706
person.identifier.scopus-author-id36627604000
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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