Room temperature charge storage ability and magnetoelectric coupling of flexible polymer nanocomposite films

被引：2
|
作者：
Halder, Monalisa [1 ]
Bhowmik, Rabindranath [2 ]
Meikap, Ajit Kumar [1 ]
机构：
[1] Natl Inst Technol, Dept Phys, Durgapur 713209, India
[2] Pondicherry Univ, Dept Phys, Pondicherry 605014, India
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2020年 / 124卷
关键词：
Nanocomposite film; Capacitance; Electrical polarisation; Magneto-dielectric effect; POLY(PHENYL ACRYLATE); POLY(STYRENE-CO-ACRYLONITRILE); MISCIBILITY; CERAMICS; DENSITY; BLENDS;
D O I：
10.1016/j.physe.2020.114346
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have fabricated flexible films of bismuth ferrite (BFO), terbium manganate (TMO) nanofiller incorporated polyvinyl alcohol (PVA) composite to achieve improved energy storage capacity at room temperature. A systematic observation on capacitance-bias voltage (C-V), ferroelectric and magneto-dielectric properties are done to evaluate the impact of the nanofillers in PVA matrix. BFO-PVA films show enhanced dielectric properties whereas decrement is noticed in TMO-PVA films. Mott-Schottky analysis is used here to understand the dielectric behaviour vividly. The Maxwell-Wagner-Sillars (MWS) type interfacial space charge polarisation causes the electrical polarisation hysteresis loops. The dielectric constant gradually decreases with increasing applied magnetic field. It indicates the negative magneto-dielectric effect of the films. The enhancement in the magneto-dielectric sensitivity is observed in all the composite films than that of pristine PVA.
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页数：7
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