Repository logo
 
Publication

Laminate composite magnetoelectric multiferroics optimized by global derivative-free optimization method

2018-06-01Journal article Restricted access
Simple item page
dc.contributor.authorJayachandran, K.P.
dc.contributor.authorMadeira, JFA
dc.contributor.authorGuedes, José
dc.contributor.authorRodrigues, Helder
dc.date.accessioned2018-10-23T10:46:30Z
dc.date.available2018-10-23T10:46:30Z
dc.date.issued2018-06-01
dc.description.abstractThe magnetoelectric multiferroics where magnetism and ferroelectricity coexist in one material have recently attracted renewed interest due to its potential applications in novel functional devices. Natural multiferroic single-phase compounds are rare and an alternative approach to obtain a magnetoelectric (ME) effect is through multilayered composites of a ferroelectric and a ferromagnetic material. An applied electric field creates a piezoelectric strain in the ferroelectric, which produces a corresponding strain in the ferromagnetic material and a subsequent change in magnetization. Various efforts to improve the value of ME coupling coefficient α have been made by modifying preparation techniques of the samples, by the proper choice of materials or different structures and by choosing different thickness of the samples. In this study, we have applied numerical optimization for arriving at the solution for maximum ME coupling coefficient α of a laminar ME composite by making use of the anisotropy of the ferroelectric phase. We have used a global derivative-free optimization method based in directional direct search coupled with specific multistart strategies for setting up the optimization problem. The effective ME couping coefficients αij∼ are computed using the asymptotic homogenization method. Optimal composite microstructure with a range of the constituent ferroelectric single-crystal configurations that enhances the overall α is identified. Optimal composite would have the [0 0 1]-axis of the ferroelectric phase oriented out-of-plane of the lamina. Yet the elasticity of the composite is found to be anisotropic at the optimal orientations of the ferroelectric phase. Stress-mediated enhancement of the ME coupling is demonstrated using the analysis of the inplane elastic stiffness of the composite.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationJAYACHANDRAN, K. P.; [et al] – Laminate composite magnetoelectric multiferroics optimized by global derivative-free. Computational Materials Science. ISSN 0927-0256. Vol. 148 (2018), pp. 190-199pt_PT
dc.identifier.doihttps://doi.org/10.1016/j.commatsci.2018.02.045pt_PT
dc.identifier.issn0927-0256
dc.identifier.urihttp://hdl.handle.net/10400.21/8959
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://reader.elsevier.com/reader/sd/pii/S0927025618301344?token=3EE525FF8C9FB01DEE50CAA2E5BF8D5D128BB99E9BC74609EE5FB61C763EB59F77C292F7CE687D5B8235645C1A4D38C7pt_PT
dc.subjectMaterial optimizationpt_PT
dc.subjectMagnetoelectric compositept_PT
dc.subjectMicromechanical modelingpt_PT
dc.subjectMicrostructure-texturept_PT
dc.subjectDerivative-free optimizationpt_PT
dc.titleLaminate composite magnetoelectric multiferroics optimized by global derivative-free optimization methodpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FEMS%2F50022%2F2013/PT
oaire.citation.endPage199pt_PT
oaire.citation.startPage190pt_PT
oaire.citation.titleComputational Materials Sciencept_PT
oaire.citation.volume148pt_PT
oaire.fundingStream5876
person.familyNameJayachandran
person.familyNameMadeira
person.familyNameMiranda Guedes
person.familyNameRodrigues
person.givenNameK.P.
person.givenNameJose Firmino Aguilar
person.givenNameJosé
person.givenNameHelder
person.identifierA-3941-2013
person.identifier.ciencia-idBB1E-2662-F9C2
person.identifier.ciencia-id6F1E-DCF0-D6EC
person.identifier.ciencia-id1913-70E9-805D
person.identifier.ciencia-idA817-A4D6-EB7F
person.identifier.orcid0000-0003-2969-4790
person.identifier.orcid0000-0001-9523-3808
person.identifier.orcid0000-0001-9364-5059
person.identifier.orcid0000-0003-0252-1371
person.identifier.ridN-6918-2016
person.identifier.ridK-7079-2012
person.identifier.scopus-author-id7005713379
person.identifier.scopus-author-id7003405549
person.identifier.scopus-author-id7003775475
person.identifier.scopus-author-id35614160700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication620440c2-b9bc-4162-bf0f-7401b54d096f
relation.isAuthorOfPublicationd495619a-a6ab-4ff5-8e70-3a1351f934dc
relation.isAuthorOfPublication1c9337e9-d323-4284-825b-0bb662b5658c
relation.isAuthorOfPublicationc35bbfbd-8d92-4451-8452-6609dbe393ae
relation.isAuthorOfPublication.latestForDiscoveryd495619a-a6ab-4ff5-8e70-3a1351f934dc
relation.isProjectOfPublicationc26dd8c5-b8c9-4ac6-8579-78539a14c943
relation.isProjectOfPublication.latestForDiscoveryc26dd8c5-b8c9-4ac6-8579-78539a14c943

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Laminate_JFAMadeira_ADM.pdf
Size:
1.29 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISEL - Matemática - Artigos