Multiferroic/Polymer Flexible Structures Obtained by Atomic Layer Deposition

Shikhgasan Ramazanov; Dinara Sobola; Gaji Gajiev; Farid Orudzhev; Pavel Kaspar; Adil Gummetov

doi:10.3390/nano13010139

Multiferroic/Polymer Flexible Structures Obtained by Atomic Layer Deposition

Nanomaterials (Basel). 2022 Dec 27;13(1):139. doi: 10.3390/nano13010139.

Authors

Shikhgasan Ramazanov¹, Dinara Sobola², Gaji Gajiev¹, Farid Orudzhev¹, Pavel Kaspar², Adil Gummetov¹

Affiliations

¹ Amirkhanov Institute of Physics, Dagestan Federal Research Center, Russian Academy of Sciences, Makhachkala 367003, Russia.
² Department of Physics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 2848/8, 61600 Brno, Czech Republic.

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.

Keywords: BiFeO3; atomic layer deposition; flexible substrate; functionalization; multiferroic; polyimide.

Grants and funding

Research described in the paper was supported by the Internal Grant Agency of Brno University of Technology, grant No. FEKT-S−20-6352. Part of the work was carried out with the support of CEITEC Nano Research Infrastructure supported by MEYS CR (LM2018110).