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

Abstract

High power consumption of nonvolatile memory is a major challenge, as it reduces the memory efficiency of information storage devices. The magnetoelectric (ME) coupling in multiferroic nanocomposites, which can be utilized in magnetoelectric random access memory, is an effective approach to reduce power consumption in information storage. Here, a type of ME nanocomposite embedded with 0.5 wt % Fe3O4 is presented, exhibiting higher ME voltage coefficients for piezoelectric thin films. Specifically, the ME voltage coefficient of the P(VDF-TrFE)/Fe3O4 composite developed in this study is 8.97 mV/(cm·Oe), which is 17.5% higher compared to that of the pure P(VDF-TrFE) at a H dc of 1000 Oe. Meanwhile, the enhanced ME effect of smart nanocomposites is characterized by the increase of diffraction peak intensity at a microscopic level. The nanocomposite films exhibit high ME voltage coefficients and information storage performance, providing a great potential for creating next-generation memory devices in the realm of artificial intelligence and wearable devices.

A Spin-Charge-Regulated Self-Powered Nanogenerator for Simultaneous Pyro-Magneto-Electric Energy Harvesting

“…A long-range order of the coupled dipoles is duly extended on the electrical poling (Figure 11c), toward a good supplier ME response. Thus, both α me 17,92−95 and V me 9,92,96,97 emerged much larger than recently reported ones (Figure 11e,f). Evidently, the energy harvesting performance can be optimized if the electric dipoles are poled fully in due electric fields, unless the films are fragile.…”

“…(e) List of magnetoelectric coefficient (α), ,− and (f) obtained maximum magnetoelectric voltage ( V max. ) of ferrite doped P­(VDF-TrFE) composites. ,,, …”

Magnetostrictive and Magnetoactive Effects in Piezoelectric Polymer Composites

“…Indeed, the very statement of the above-solved problem applies not to the resonance regimes of cantilever-type setups but to quasi-static situations which are customary for experimental tests on stimulated cell development, i.e., tissue engineering. Going along this line, we recall that in our simulations the volume fraction of CFO is ϕ v ∼ 0.15 that, when recalculated to weight content for ρ CFO ∼ 5 and ρ PVDF ∼ 2 g/cm 3 , yields ϕ w ∼ 0.3. If to consider a film with weight content ϕ w ∼ 0.1 that is typical for the biologically-oriented ME films [39], one arrives at α V ∼ 7 mV cm•Oe.…”

“…Along this route either the magnetic phase acts on the piezoelectric one (the direct ME effect) or vice versa (the inverse ME effect). From that stem all the versatile applications of ME transducers and convertors as sensors and actuators [ 1 , 2 ], non-volatile memory [ 3 ], energy harvesters [ 4 , 5 , 6 ], activators of tissue regeneration processes [ 7 , 8 , 9 , 10 , 11 ], etc.…”

Multifunctionality in Electrically Poled PMN–PT/Ni–Mn–In Multiferroic Heterostructure for Flexible Magnetic Field Sensing and Nonvolatile Memory Applications

“…In all other cases, the MD coefficient value is relatively lower. Furthermore, the dependence of magnetostrictive layer thickness on the strength of ME coupling has been computed by measuring the ME coupling coefficient (α ME ) using the empirical formula: α ME = normalΔ E normalΔ H = normalΔ V t normalΔ H AC where t , Δ V , and Δ H AC are the thickness of the piezoelectric layer, ME output voltage, and applied AC magnetic field, respectively. Figure d illustrates the graphic of the experimental setup utilized for measuring the ME output voltage.…”