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Multicaloric effect in a multiferroic composite of Gd5(Si,Ge)4 microparticles embedded into a ferroelectric PVDF matrix

Andrade, V. M. ; Amirov, A. ; Yusupov, D. ; Pimentel, B. ; Barroca, N. ; Pires, A. L. ; Belo, J. H. ; Pereira, A. M. ; Valente, M. A. ; Araújo, J. P. ; Reis, M. S.

Scientific reports, 2019-12, Vol.9 (1), p.1-10, Article 18308 [Periódico revisado por pares]

London: Nature Publishing Group

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  • Título:
    Multicaloric effect in a multiferroic composite of Gd5(Si,Ge)4 microparticles embedded into a ferroelectric PVDF matrix
  • Autor: Andrade, V. M. ; Amirov, A. ; Yusupov, D. ; Pimentel, B. ; Barroca, N. ; Pires, A. L. ; Belo, J. H. ; Pereira, A. M. ; Valente, M. A. ; Araújo, J. P. ; Reis, M. S.
  • Assuntos: Magnetism ; Microparticles
  • É parte de: Scientific reports, 2019-12, Vol.9 (1), p.1-10, Article 18308
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Abstract The coupling between electric, magnetic and elastic features in multiferroic materials is an emerging field in materials science, with important applications on alternative solid-state cooling technologies, energy harvesting and sensors/actuators. In this direction, we developed a thorough investigation of a multiferroic composite, comprising magnetocaloric/magnetostrictive Gd $_{5} 5 Si $_{2.4} 2.4 Ge $_{1.6} 1.6 microparticles blended into a piezo- and pyroelectric poly(vinylidene) fluoride (PVDF) matrix. Using a simple solvent casting technique, the formation and stabilization of PVDF electroactive phases are improved when the filler content increases from 2 to 12 weight fraction (wt.%). This effect greatly contributes to the magnetoelectric (ME) coupling, with the ME coefficient \alpha }_{ME} α M E increasing from 0.3 V/cm.Oe to 2.2 V/cm.Oe, by increasing the amount of magnetic material. In addition, magnetic measurements revealed that the ME-coupling has influenced the magnetocaloric effect via a contribution from the electroactive polymer and hence leading to a multicaloric effect. These results contribute to the development of multifunctional systems for novel technologies.
  • Editor: London: Nature Publishing Group
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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