Session: 02-01: Multiferroics

Paper Number: 90574

90574 - Magnetoelectric Response of Multiferroic Polymeric Composites Containing a Magnetoactive Elastomer 

Magnetoelectric response of multiferroic polymeric composites containing a magnetoactive elastomer
Gašper GLAVAN^{1, a}, Inna A. BELYAEVA^{1, b}, Mikhail SHAMONIN^{1, c
1} East Bavarian Centre for Intelligent Materials (EBACIM), Ostbayerische Technische Hochschule (OTH) Regensburg, Seybothstr. 2, D-93053 Regensburg, Germany
^a gasper.glavan@oth-regensburg.de, ^b inna.belyaeva@oth-regensburg.de, ^c mikhail.chamonine@oth-regensburg.de

Keywords: smart materials; composite materials; laminated structure; cantilever; magnetoactive elastomers; polyvinylidene fluoride; mechanical properties; magnetoelectric effect

Abstract: It has been recently proposed that layered structures comprising a piezoelectric polymer (PEP) and a magnetoactive elastomer (MAE), which is a random heterogeneous composite material, where micrometer-sized iron particles are dispersed in a polydimethylsiloxane matrix, are promising as sensors and energy harvesting devices [1]. Large bending deformations and large induced voltages (up to 650 mV) have been observed in the external gradient magnetic fields.
Motivated by this research, the voltage, charge and bending responses of multilayer cantilevers to pulsed and oscillating uniform magnetic fields are investigated in detail. Cantilevers comprise a MAE layer of different thicknesses and a polyvinylidene fluoride (PVDF) thin film. The magnetic field is applied in the vertical direction and the cantilevers are fixed in the horizontal plane. Six different MAE compositions incorporating three concentrations of carbonyl iron particles (70 wt%, 75 wt% and 80 wt%) and two elastomer matrices of different stiffness are used in measurements.
The voltage between the electrodes of a piezoelectric material upon application of a magnetic field can be considered as a manifestation of the direct magnetoelectric (ME) effect in a composite laminated structure.
The ME voltage response increases with the increasing thickness and concentrations of the MAE layer. The relationship between the generated voltage and the cantilever’s deflection is established. The highest observed peak voltage around 5.5 V is about 8.5-fold higher than previously reported values. The quasi-static ME voltage coefficient for this type of bilayer cantilevers is about 50 V/A in the magnetic field of 100 kA/m. The results could be useful for the development of magnetic field sensors and energy harvesting devices [2].

References:
1. Makarova, L.A. et al. Tunable Layered Composites Based on Magnetoactive Elastomers and Piezopolymer for Sensors and Energy Harvesting Devices. J. Phys. Appl. Phys. 2021, 54, 015003, doi:10.1088/1361-6463/abb7b7.
2. Glavan, G. et al. Magnetoelectric Response of Laminated Cantilevers Comprising a Magnetoactive Elastomer and a Piezoelectric Polymer, in Pulsed Uniform Magnetic Fields. Sensors 2021, 21, 6390, doi:10.3390/s21196390.

Presenting Author: Gašper Glavan East Bavarian Centre for Intelligent Materials (EBACIM), Ostbayerische Technische Hochschule (OTH) Regensburg