Multiferroic BiFeO3 thin films: Structural and magnetic characterization

Zohaib, Ali; Abbas, Y.; Sedeek, K.; Adam, Abdullahi Abbas; Abdeltwab, E.

doi:10.1016/j.tsf.2014.09.021

Cited by 15 publications

(4 citation statements)

References 39 publications

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“…The most unique properties of bismuth ferrites are their high magnetic and electrical characteristics at room temperature [1]. Nowadays, to improve the ferroelectric and magnetoelectric behavior of nanocomposites based on bismuth ferrites, the effects of replacing Bi cations with cations of other rare-earth elements with a close ion radius, similar type and size of crystallites, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Isovalent Substitution of Bi Cations by La Cations on the Crystal Structure and Thermodynamic Properties of Nanocomposites Based on Bismuth Ferrite

Dolgoshey¹,

Fesenko²,

Tsebriinko³

et al. 2022

J. Nano- Electron. Phys.

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The work is devoted to the study of nanocomposites of bismuth ferrites (BFO) and bismuth lanthanum ferrites (BLFO). The effect of substitution of Bi cations by La cations on the crystal structure and thermodynamic properties of bismuth ferrites was studied. These composites were prepared by the modern method of sol-gel synthesis. Scanning electron microscope (SEM) images of the prepared samples were obtained. Using SEM method, it was established that the morphology of BFO and BLFO is similar. All samples have a granular microstructure with granule sizes from 20 to 100 nm. This means that, at a scale above 200 nm, all samples are morphologically indistinguishable, while structural features appear at smaller scale levels. X-ray diffraction analysis was preformed, and the thermodynamic properties of these bismuth ferrites were studied. X-ray diffraction study revealed the crystallinity of bismuth ferrites at a scale level of less than one nanometer. It was found that the formation of nanocomposites based on bismuth ferrites occurs according to the nucleation mechanism of non-isothermal crystallization. When cooled, the BFO sample is a three-component material. As a result of the substitution of La cations for Bi cations, a more homogeneous two-component BLFO structure is formed, which consists of BiLaFeO3 crystallites and Bi2Fe4O9 crystallites with approximately equal dimensions (about 0.400 nm 3 ). It was also found a decrease in the heat capacity, enthalpy, entropy and Gibbs energy modulus in BLFO compared to BFO, which indicates an improvement in the thermodynamic compatibility of components due to a decrease in heat losses at structural defects.

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Section: Introductionmentioning

confidence: 99%

Effect of Isovalent Substitution of Bi Cations by La Cations on the Crystal Structure and Thermodynamic Properties of Nanocomposites Based on Bismuth Ferrite

Dolgoshey¹,

Fesenko²,

Tsebriinko³

et al. 2022

J. Nano- Electron. Phys.

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“…In the past decade, considerable attention has been devoted to the study of bismuth ferrites as the material that is characterized by both magnetic and strong ferroelectric properties at room temperature [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Annealing Temperature on the Structure and Properties of Bismuth Ferrites

Korskanov¹,

Fesenko²,

Tsebrienko³

et al. 2021

J. Nano- Electron. Phys.

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“…Moreover, nanoferrites have been the subject of current interest as they exhibit different physical properties from their bulk counterparts. The electrical and magnetic properties changes drastically as the particle size goes down to nanometric scale and these deviations widen the scope of applications [13,14]. Pure nano-Liferrites and Co 2+ -and Ni 2+ -doped nano-Li-ferrites have been prepared by the sol-gel auto-combustion technique and they were given heat treatment at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Low dielectric loss in nano-Li-ferrite spinels prepared by sol–gel auto-combustion technique

et al. 2016

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Pure and doped nano-Li-ferrite spinels were prepared by the sol-gel auto-combustion technique. The prepared ferrites were pelleted and heat treated at different temperatures. Structural characterization was carried out on the as-prepared samples and also on the heat-treated samples using X-ray diffraction (XRD). The studies confirmed the formation of single phase with spinel structures in all the samples. The crystallite size of the samples evaluated from XRD data was found to be 17-24 nm. Scanning electron microscopic photomicrographs revealed the microstructures and the grain size of these nanoferrites. The room-temperature dielectric constant and dielectric loss tangent, tan δ were measured as a function of frequency in the range 100 Hz-1 MHz. These nanoferrites showed the normal dielectric dispersion behaviour. The observed dielectric constant and dielectric loss tangent were found to be much lower than those measured on substituted Li-ferrites prepared by the conventional ceramic method. The results obtained were discussed in the paper.

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Multiferroic BiFeO3 thin films: Structural and magnetic characterization

Cited by 15 publications

References 39 publications

Effect of Isovalent Substitution of Bi Cations by La Cations on the Crystal Structure and Thermodynamic Properties of Nanocomposites Based on Bismuth Ferrite

Effect of Isovalent Substitution of Bi Cations by La Cations on the Crystal Structure and Thermodynamic Properties of Nanocomposites Based on Bismuth Ferrite

Influence of the Annealing Temperature on the Structure and Properties of Bismuth Ferrites

Low dielectric loss in nano-Li-ferrite spinels prepared by sol–gel auto-combustion technique

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