Brief Theoretical Overview of Bi-Fe-O Based Thin Films

Abstract

This paper will provide a brief overview of the unique multiferroic material Bismuth ferrite (BFO). Considering that Bismuth ferrite is a unique material which possesses both ferroelectric and magnetic properties at room temperature, the uniqueness of Bismuth ferrite material will be discussed. Fundamental properties of the material including electrical and ferromagnetic properties also will be mentioned in this paper. Electrical properties include characterization of basic parameters considering the electrical resistivity and leakage current. Ferromagnetic properties involve the description of magnetic hysteresis characterization. Bismuth ferrite can be fabricated in a different form. The common forms will be mentioned and include powder, thin films and nanostructures. The most popular method of producing thin films based on BFO materials will be described and compared. Finally, the perspectives and potential applications of the material will be highlighted.

Exploring morphological variation in bismuth ferrite nanostructures by pulsed laser deposition: synthesis, structural and electrochemical properties

“…Cyclic voltammetry measurements were conducted using a multichannel Potentiostat/Galvanostat Ivium-n-Stat, with a K 2 SO 4 electrolyte and three electrodes: a saturated calomel electrode as the reference, a stainless steel mesh counter electrode, and the working electrode where the BFO nanostructures deposited on the stainless steel substrate, to be characterized, are placed. A mixture of phases was observed in the XRD patterns of all as-deposited nanostructures, containing BiFeO 3 along with other phases normally considered side products in its synthesis: Bi 2 Fe 4 O 9 and Bi 25 FeO 40 (see figure 2(a)) [28]. All the peak positions that match the Bi 2 Fe 4 O 9 phase were marked with brown circles, those that match the Bi 25 FeO 40 phase were marked with pink stars, and those that match the BiFeO 3 phase were marked with red crosses.…”

“…This jeopardizes a quantitative analysis based on Rietveld refinement. Thus, a qualitative analysis of the diffraction peaks was conducted by comparing them to the pattern of pure bismuth ferrite phase, which is reported in the crystallography open database (COD) and using the software Panalytical Xpert-High Score.A mixture of phases was observed in the XRD patterns of all as-deposited nanostructures, containing BiFeO 3 along with other phases normally considered side products in its synthesis: Bi 2 Fe 4 O 9 and Bi 25 FeO 40 (see figure2(a))[28]. All the peak positions that match the Bi 2 Fe 4 O 9 phase were marked with brown circles, those that match the Bi 25 FeO 40 phase were marked with pink stars, and those that match the BiFeO 3 phase were marked with red crosses.…”

Exploring the Piezoelectric Properties of Bismuth Ferrite Thin Films Using Piezoelectric Force Microscopy: A Case Study

“…The PFM images represent switching behavior between perpendicular components of polarization, which can be divided into two states: dark and bright. The bright region corresponds with downward direction of polarization, which means that the polarization vector is oriented downward and associated with the [111] or [1][2][3][4][5][6][7][8][9][10][11] polarization direction [30]. Dark regions, on the other hand, are oriented upward and related [−1 -11] or [−111] direction [30].…”

“…In the world of an ever-increasing need of energy-efficient multifunctional material, the focus of the research lends itself towards new materials with different combinations of properties. Multiferroic materials attract considerable attention due to their unique combination of simultaneous magnetic and ferroelectric response [1].…”

“…Bismuth ferrite is a multiferroic material with asymmetric rhombohedral perovskite structure with R3c space orientation with lattice parameters a = b = (5-7) Å and hexagonal c = (13-14) Å. The angle α is around 60 degrees [1]. Aside from having the unique combination of a magnetic and ferroelectric response, the material shows outstanding temperature stability with a high Curie [2] (Tc = 1120 K) point.…”