Investigation of fractal feature of multiferroic BiFeO<sub>3</sub> thin films deposited on different substrates

Singh, Gulab; Yadav, R. P.; Bhasker, H. P.; Kumar, Manvendra; Rajput, Parasmani; Rao, P. Nageswara; K., S.; Singh, Manoj K.

doi:10.1088/2053-1591/aae1c0

Cited by 11 publications

(6 citation statements)

References 45 publications

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“…A strong correlation was found between the annealing temperature, surface roughness and FD. Singh et al [69] studied multiferroic BiFeO 3 films prepared on Si, STO, and sapphire substrates, and they calculated the FD of the topography profiles in rows and columns respectively. It was found that all the samples shown the anti-persistence behaviour by fractal analysis of Hurst exponent, and the anisotropic level on different substrates can be suggested by FD value.…”

Section: Pulsed Laser Depositionmentioning

confidence: 99%

“…FD is a measure of surface irregularities and discontinuities. Fractal analysis can be associated with cluster size [73][74][75]86], deposition state [37,63,76], topography [69,88], material composition estimations [99] and other parameters to obtain more objective results than the traditional roughness characterization, which is favorable for further interpreting the growth mechanism of thin film surfaces [68,79,83,100]. The specific value and variation trend of FD can play an important role in the comparative investigations of thin films under different conditions.…”

Section: Prospective Developing Trendsmentioning

confidence: 99%

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Fractal Analysis on Surface Topography of Thin Films: A Review

et al. 2022

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The topographies of various surfaces have been studied in many fields due to the significant influence that surfaces have on the practical performance of a given sample. A comprehensive evaluation requires the assistance of fractal analysis, which is of significant importance for modern science and technology. Due to the deep insights of fractal theory, fractal analysis on surface topographies has been widely applied and recommended. In this paper, the remarkable uprising in recent decades of fractal analysis on the surfaces of thin films, an essential domain of surface engineering, is reviewed. By summarizing the methods used to calculate fractal dimension and the deposition techniques of thin films, the results and trends of fractal analysis are associated with the microstructure, deposition parameters, etc. and this contributes profoundly to exploring the mechanism of film growth under different conditions. Choosing appropriate methods of surface characterization and calculation methods to study diverse surfaces is the main challenge of current research on thin film surface topography by using fractal theory. Prospective developing trends are proposed based on the data extraction and statistics of the published literature in this field.

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Section: Pulsed Laser Depositionmentioning

confidence: 99%

Section: Prospective Developing Trendsmentioning

confidence: 99%

Fractal Analysis on Surface Topography of Thin Films: A Review

et al. 2022

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“…Thin-film-based devices have attracted lots of attention, as thin films exhibit physical and chemical properties different from those of the same material in bulk. − In the case of thin-film and nanostructure devices, the surface to volume ratio is large compared to bulk material. , The surface morphology of thin films (nanostructure) influences the functional properties of SCs, which play a major role in energy storages. Therefore, a detailed knowledge of the surface morphology is important for the fabrication of devices having the desired properties .…”

Section: Introductionmentioning

confidence: 99%

Effect of Fe Doping on the Surface Morphology and Supercapacitor Properties of Sr(OH)₂ Thin Films: A Fractal Approach

Yadav

Priya

et al. 2021

J. Phys. Chem. C

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Fractal concepts have been employed to explore the morphological evolution of Sr(OH) 2 thin films prepared by the successive ionic layer adsorption and reaction (SILAR) method on stainless steel (SS) substrate. The surface morphology of each sample was captured using atomic force microscopy (AFM). Interface width, lateral correlation length, and roughness exponent were computed. Our study reveals that as doping is increased, the roughness exponent decreases and the fractal dimension increases. In all cases, the value of the roughness exponent was found to be greater than 0.5, indicating that the height fluctuations at neighboring pixels are correlated positively and exhibit persistent behavior and memory effect. Advanced fractal parameters such as lacunarity coefficient (σ), Hurst coefficient (HC), fractal succolarity (FS), and surface entropy (SE) are also calculated. Our study reveals that the surface entropy does not show any significant change, indicating a globally uniform surface. Furthermore, the local surface slope is found to play a crucial role in the performance of supercapacitive electrodes. Fractal analysis indicates that electrodes with larger fractal dimension are better for supercapacitor applications. These observations are corroborated with the 0.5 atom % Fe/Sr(OH) 2 doped sample. This sample exhibits both the highest fractal dimension and a specific capacity of 776 C g −1 at a scan rate of 5 mV s −1 . The materials with higher fractal dimension could thus be a strong candidate for the fabrication of highly efficient supercapacitors.

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“…However, the complete switching of ferroelectric domains by an applied magnetic field has rarely been observed. These properties make them a potential candidate for many device applications, such as spintronics [4], actuators [6,7], sensors and transducers [8][9][10] and memory devices [11][12][13][14]. The large remnant polarization and ME effect in multiferroics provides an additional degree of freedom to design spintronics devices [5,15].…”

Section: Introductionmentioning

confidence: 99%

“…Bismuth ferrite (BFO) is the only single-phase material which shows multiferroic phenomena at room temperature with a relatively high ferroelectric Curie temperature (T c ∼1103 K) and antiferromagnetic Neel temperature (T N ∼643 K). The structure of BFO is a rhombohedrally distorted perovskite with the space group R3c [1,5,[14][15][16][17] and has canted G-type antiferromagnetic order due to the local spin ordering of Fe 3+ with a cycloidal spiral spin structure [18]. The cycloidal spiral spin structure is supposed to be incommensurate with the structural lattice, which is superimposed on the antiferromagnetic order.…”

Section: Introductionmentioning

confidence: 99%

Magneto-dielectric and multiferroic properties in Bi_0.95Yb_0.05Fe_0.95Co_0.05O₃

et al. 2019

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Bismuth ferrite (BFO) and (Yb, Co) co-doped BFO powder are successfully synthesized using the sol-gel method. The structural, electrical, magneto-dielectric and multiferroic properties of pure and co-doped BFO have been systematically investigated. The crystal structures of these samples are investigated using x-ray diffraction techniques, which confirmed the single-phase polycrystalline rhombohedral perovskite structure with the R3c space group. The co-substitution studies revealed that the electrical, ferromagnetic and ferroelectric properties of BFO were significantly enhanced compared to pure BFO samples.

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Investigation of fractal feature of multiferroic BiFeO₃ thin films deposited on different substrates

Cited by 11 publications

References 45 publications

Fractal Analysis on Surface Topography of Thin Films: A Review

Fractal Analysis on Surface Topography of Thin Films: A Review

Effect of Fe Doping on the Surface Morphology and Supercapacitor Properties of Sr(OH)₂ Thin Films: A Fractal Approach

Magneto-dielectric and multiferroic properties in Bi_0.95Yb_0.05Fe_0.95Co_0.05O₃

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Investigation of fractal feature of multiferroic BiFeO3 thin films deposited on different substrates

Cited by 11 publications

References 45 publications

Fractal Analysis on Surface Topography of Thin Films: A Review

Fractal Analysis on Surface Topography of Thin Films: A Review

Effect of Fe Doping on the Surface Morphology and Supercapacitor Properties of Sr(OH)2 Thin Films: A Fractal Approach

Magneto-dielectric and multiferroic properties in Bi0.95Yb0.05Fe0.95Co0.05O3

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Investigation of fractal feature of multiferroic BiFeO₃ thin films deposited on different substrates

Effect of Fe Doping on the Surface Morphology and Supercapacitor Properties of Sr(OH)₂ Thin Films: A Fractal Approach

Magneto-dielectric and multiferroic properties in Bi_0.95Yb_0.05Fe_0.95Co_0.05O₃