Structural, dielectric, and magnetic properties of epitaxially grown BaFeO3 thin films on (100) SrTiO3 single-crystal substrates

Abstract

We have prepared single-crystalline films of BaFeO3, which may contain high valent Fe4+ ions, on (100) SrTiO3 substrates by pulsed laser-beam deposition. The reflection high-energy electron diffraction patterns for the films apparently show a C4 symmetry operation, suggesting that the sample had a pseudocubic perovskite structure rather than hexagonal unit cell. The films were found to be highly insulating, and showed a high value of dielectric constant of ε=59. At 300 K, the magnetization loop of the film apparently shows hysteresis, as well as small remanent magnetization. These characteristics are totally different from those of bulk BaFeO3.

Effect of Ba ions substitution on multiferroic properties of BiFeO3 perovskite

“…In addition, charge compensation required on adding Ba 2+ ions to BiFeO 3 , which can be achieved by formation of Fe 4+ or oxygen vacancies. If Fe 4+ exists, the statistical distribution of Fe 3+ and Fe 4+ ions in the octahedral may also lead to net magnetization and ferromagnetism [26].…”

A Ferroelectric Ferromagnetic Composite Material with Significant Permeability and Permittivity

“…[1,2] The combination of both ferroelectric and ferromagnetic materials in a single material is expected to produce new properties, such as magneto-electric, [3] magneto-optic, [4] and other new coupling properties, due to the occurrence of coupling effects between the magnetization and electric polarization. However, there are only a few naturally occurring materials that can exhibit both spontaneous magnetization and electric polarization (or exhibiting both ferromagnetic and ferroelectric properties).…”

Impedance spectroscopy and dielectric behavior in barium strontium titanate–nickel zinc ferrite composites

“…1 Introduction Composite materials containing both ferroelectric and ferromagnetic phases have recently attracted a great deal of attention because of their potential applications in practical electronic devices [1,2]. When ferromagnetism and ferroelectricity coexist in a material, magnetic-electric effect phenomena are expected due to the interaction between the magnetization and the electric polarization [3][4][5].…”