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

被引：21

作者：

Andrade, V. M. ^{[1
,2
,3
]}

Amirov, A. ^{[4
,5
,6
]}

Yusupov, D. ^{[6
]}

Pimentel, B. ^{[7
]}

Barroca, N. ^{[1
,2
]}

Pires, A. L. ^{[1
,2
]}

Belo, J. H. ^{[1
,2
]}

Pereira, A. M. ^{[1
,2
]}

Valente, M. A. ^{[8
,9
]}

Araujo, J. P. ^{[1
,2
]}

Reis, M. S. ^{[7
,8
,9
]}

机构：

[1] Univ Porto, IFIMUP, Dept Phys & Astron, Fac Sci, Rua Campo Alegre 687, P-4169007 Porto, Portugal

[2] Univ Porto, IN Inst Nanosci & Nanotechnol, Dept Phys & Astron, Fac Sci, Rua Campo Alegre 687, P-4169007 Porto, Portugal

[3] State Univ Campinas UNICAMP, Gleb Wataghin Phys Inst, CP 6165, BR-13083970 Campinas, SP, Brazil

[4] Immanuel Kant Balt Fed Univ, Lab Novel Magnet Mat, Kaliningrad, Russia

[5] Immanuel Kant Balt Fed Univ, Inst Phys Math & Informat Technol, Kaliningrad, Russia

[6] Russian Acad Sci, Amirkhanov Inst Phys, Daghestan Sci Ctr, Makhachkala, Russia

[7] Fluminense Fed Univ, Inst Phys, Ave Gal Milton Tavares de Souza S-N, BR-24210346 Niteroi, RJ, Brazil

[8] Univ Aveiro, Dept Phys, P-3810193 Aveiro, Portugal

[9] Univ Aveiro, I3N, P-3810193 Aveiro, Portugal

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

基金：

俄罗斯科学基金会;

关键词：

BETA; FILMS; NANOCOMPOSITES; OPTIMIZATION; POLYMER; PHASES; ALPHA;

D O I：

10.1038/s41598-019-54635-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：10

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