Multiferroic/Polymer Flexible Structures Obtained by Atomic Layer Deposition

Abstract

The paper considers how a film of bismuth ferrite BiFeO3 (BFO) is formed on a polymeric flexible polyimide substrate at low temperature ALD (250 °C). Two samples of BFO/Polyimide with different thicknesses (42 nm, 77 nm) were studied. As the thickness increases, a crystalline BFO phase with magnetic and electrical properties inherent to a multiferroic is observed. An increase in the film thickness promotes clustering. The competition between the magnetic and electrical subsystems creates an anomalous behavior of the magnetization at a temperature of 200 K. This property is probably related to the multiferroic/polymer interface. This paper explores the prerequisites for the low-temperature growth of BFO films on organic materials as promising structural components for flexible and quantum electronics.

Surface Functionalization of TiO2 Nanotubes Modified with a Thin Film of BiFeO3

“…If the substrate has a bending property, mechanical stress can easily relax throughout its surface, creating non-uniform regions of voltage accumulation. This property of BFO is particularly useful for heterostructures with flexible substrates [46]. Figure 6 shows an SEM image of nanotube surfaces after deposition, where the film can press on the substrate and thereby spread out more free nanotubes.…”

Exploring RF Magnetron Sputtering Growth Composite Thin Film BiFeO3-Bi2Fe4O9 on C-Plane Al2O3 Substrate

“…The increased interest of researchers in multiferroics, in which ferromagnetic and ferroelectric ordering coexist, is associated with the potential applications [1][2][3]. The connection between the ferroelectric and ferromagnetic or antiferromagnetic properties in magnetoelectric materials is widely used in multifunctional memory devices and spintronics [3,4].…”