A Sandwich Metal–Insulation–Metal Composite for Magnetoelectric Memory: Experiment and Modeling

Abstract

Driven by the development of internet technology, higher requirements on information materials and data storage devices were demanded. To improve the work efficiency and performance of the new generation of information materials and data storage devices, the magnetoelectric (ME) coupling and storage mechanism of magnetoelectric composites deserve more attention. Here, we explored the influence of applied magnetic fields on the output voltage on a metal–insulation–metal (MIM) sandwich composite for realizing the magnetoelectric memory by experiments and modeling. It is found that the DC magnetic field ( H dc ) and the output voltage of the polyvinylidene fluoride film are linearly correlated. At a frequency of 1 kHz, the magnetoelectric voltage coefficient is 60.71 mV cm –1 Oe –1 , which is evidently larger than that of other film materials. From this work, we can conclude that the MIM sandwich composite could generate higher magnetoelectric voltage under the AC magnetic field ( H ac ) with higher frequency, which could be used as the magnetoelectric memory device, and provides significant support for improving the performance of magnetoelectric memory devices and the whole internet system.

Enhanced Polarization Effect of Flexible Magnetoelectric PVDF-TrFE/Fe3O4 Smart Nanocomposites for Nonvolatile Memory Application

“…18 However, because the magnetostrictive materials have difficulty in realizing nondestructive reading in information storage due to the lack of flexibility, 19,20 it is necessary to develop flexible ME nanocomposites. 21 The ME effect of the composite with metal/insulating dielectric/metal sandwich structures under the applied H ac and H dc was explored, 22 mV/(cm•Oe). Despite the ME effect in the nanocomposite being still weaker than that in laminate composite structures, they still can be used in information storage depending on the merits of simple fabrication, high flexibility, and easy shaping.…”

“…However, because the magnetostrictive materials have difficulty in realizing nondestructive reading in information storage due to the lack of flexibility, , it is necessary to develop flexible ME nanocomposites . The ME effect of the composite with metal/insulating dielectric/metal sandwich structures under the applied H ac and H dc was explored, and the measured α ME was 60.71 mV/(cm·Oe). Feng et al investigated the ME effect of the flexible polymer modulated by the 1-D magnetic nanomaterials, in which the α ME was 39.5 mV/(cm·Oe).…”

Analysis of magnetoelectric properties of Cu-PZT layered composite structure for passive sensing

“…While the applied H ac generated by the Helmholtz coil passed through the metal electrode, eddy currents appeared on the metal electrodes which were subjected to a DC magnetic field. 23) Then Ampere forces acted on the PZT, induced the magnetoelectric voltage. Subsequently, energy transfer in the course involved three physical fields and was modeled in the finite element method (FEM) to analyze the magnetoelectric effect of the sample.…”