Multicaloric effect in a multiferroic composite of Gd-5(Si,Ge)(4) microparticles embedded into a ferroelectric PVDF matrix

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Andrade, VM (Autor) Outra; Amirov, A (Autor) Outra; Yusupov, D (Autor) Outra; Pimentel, B (Autor) Outra; Barroca, N (Autor) Outra; Pires, AL (Autor) Outra; Belo, JH (Autor) FCUP; pereira, a. m. (Autor) FCUP; Valente, MA (Autor) Outra; araujo, j. p. (Autor) FCUP; Reis, MS (Autor) Outra

Revista

Título: Scientific Reports

Vol. 9 Nº 3413

ISSN: 2045-2322

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 20 Citações

Scopus - 20 Citações

Outras Informações

ID Authenticus: P-00R-F6Q

DOI: 10.1038/s41598-019-54635-8

Abstract (EN): 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 Gd5Si2.4Ge1.6 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) 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10