Multiferroic iron doped BaTiO3 nanoceramics synthesized by sol-gel auto combustion: Influence of iron on physical properties

Khirade, Pankaj P.; Birajdar, Shankar D.; Raut, A. V.; Jadhav, K. M.

doi:10.1016/j.ceramint.2016.05.021

Cited by 88 publications

(30 citation statements)

References 50 publications

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“…2. The XRD patterns of FeTiO3 oxidized at different temperatures for 4 h show that the FeTiO3 samples are slowly oxidized for temperature range of 600-1000 °C and completely oxidized above 1000 °C for 4 h. This is why the pure hexagonal phase is formed for only 0.06 Fedoped BaTiO3 reported by Vanderah et al [10] by using multiple one week heatings at 1250-1270 °C as the temperature and the time of this study are higher than 1100 °C/4 h. While Khirade et al [11] found that the tetragonal phase is stable for (x = 0.0 to 0.3) and the mixed phase of the tetragonal and hexagonal structure is stable in the sample with higher Fe concentration (x = 0.4 and 0.5) as the temperature used is 900°C…”

Section: Resultsmentioning

confidence: 43%

Dielectric Anomalies of BaTi1-xFexO3 Ceramics for x = 0.0 to 0.6 of Fe Doping Concentration

Gouitaa¹,

Lamcharfi²,

Bouayad³

et al. 2017

Asian J. Chem.

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Section: Resultsmentioning

confidence: 43%

Dielectric Anomalies of BaTi1-xFexO3 Ceramics for x = 0.0 to 0.6 of Fe Doping Concentration

Gouitaa¹,

Lamcharfi²,

Bouayad³

et al. 2017

Asian J. Chem.

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“…techniques. The sol-gel technique is the utmost adaptable process to produce synthetic nanoparticles of spinel ferrites and having uncountable benefits over other synthesis methods for instance; requires low temperature, ecofriendly, desired nanoarchitecture, chemically stable product formation with desired morphology through modification of synthesis environments and parameters [22][23][24]. The doping of variability of divalent, trivalent and tetravalent cations (Mg 2+ , Zn 2+ , Cd 2+ , Cu 2+ , Cr 3+ , Ga 3+ , Zr 4+ , Sn 4+ , Ti 4+ ) with different molar compositions are another crucial factor that has an effect on physico-chemical properties of spinel ferrite nanoparticles [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Sol–gel auto-ignition fabrication of Gd3+ incorporated Ni0.5Co0.5Fe2O4 multifunctional spinel ferrite nanocrystals and its impact on structural, optical and magnetic properties

Pawar¹,

Khirade

Vinayak³

et al. 2020

SN Appl. Sci.

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Monophasic nanocrystals of rare earth gadolinium (Gd 3+) ion doped nickel-cobalt ferrite, Ni 0.5 Co 0.5 Gd y Fe 2−y O 4 (y = 0.00, 0.025, 0.050, 0.075, 0.100 and 0.125) have been synthesized by l-ascorbic acid assisted sol-gel auto-ignition process. Thermogravimetric and differential scanning calorimetry, X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) with selected area electron diffraction (SAED) patterns, ultraviolet-visible spectrophotometry and vibrating sample magnetometer were employed to characterize the microstructure, optical and magnetic properties. Structural investigations verified the presence of cubic spinel phase short of any contamination peak. The average crystallite size was seen in nano-regime dimensions and well confirmed by TEM results. SAED patterns showed bright and intense ring of (311) plane revealed the establishment of spinel ferrite nanocrystals. Lattice constant (a) increases steadily with the rise in Gd 3+ content following the Vegard's law. FTIR spectra confirmed the creation of spinel ferrite structural geometry. Saturation magnetization (M s) and a remanence magnetization (M r) decreased from 29.77 to 20.78 emu/g and 21.62 to 15.79 emu/g, respectively, with increasing the Gd 3+ content. However, coercivity (H c) is significantly increased. The highest value of H c = 1132 Oe was found for y = 0.075 sample. The reduction in M s values can be justified owing to the replacement of Fe 3+ existing at the octahedral [B]-sites by the Gd 3+ ions which is paramagnetic at room temperature. The elucidation of magnetic parameters with Gd 3+ doping was attributed to the discrepancy of anisotropy constant, the paramagnetic nature of Gd 3+ and crystallite size effect.

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“…In the past decade, renewed interest has been dedicated to perovskites (ABO 3 ) and spinels (AB 2 O 4 ) because of the opportunity of combining these oxides in composite structures to obtain multifunctional materials [2][3][4]. Composite powders merging perovskites and spinels have been usually prepared by the mixture method [5,6].…”

Section: Introductionmentioning

confidence: 99%

Structural, microstructural and magnetic properties of sol–gel-synthesized novel BaZrO3–CoFe2O4 nanocomposite

Khirade¹

2019

J Nanostruct Chem

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A novel 0.5(BaZrO 3)-0.5(CoFe 2 O 4) (BZ-CF) nanocomposite ceramics has been synthesized using sol-gel autocombustion and mixing technique. The structural analysis was carried out using X-ray diffraction (XRD) technique. The XRD pattern shows mixed perovskite and spinel ferrite phases with simple cubic structure for the BZ-CF nanocomposite. The calculated average crystallite size of the samples varies of the order of the nanoregime. The lattice parameter (a) and other structural parameter were obtained using XRD data and it is found that the structural data of pure parent ceramics were in the reported range. The surface morphology of grains of the present samples was examined using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The FESEM images show spherical particles with average grain size in the nanometer range. Compositional stoichiometry was confirmed by energy dispersive spectrum (EDX) analysis. Fourier-transform infrared spectra (FTIR) of barium zirconate (BZ) and cobalt ferrite (CF) confirmed the perovskite and spinel ferrite structure, respectively. However, the FTIR spectrum of BZ-CF nanocomposite confirmed the change in crystal structure due to mixed phases. The M-H curves recorded at room temperature using pulse field hysteresis loop tracer technique exhibits a weak hysteresis loop for BZ-CF nanocomposite, perfectly diamagnetic nature for BZ nanoceramics, and typical ferromagnetic hysteresis loop for pure CF nanoceramics.

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Multiferroic iron doped BaTiO3 nanoceramics synthesized by sol-gel auto combustion: Influence of iron on physical properties

Cited by 88 publications

References 50 publications

Dielectric Anomalies of BaTi1-xFexO3 Ceramics for x = 0.0 to 0.6 of Fe Doping Concentration

Dielectric Anomalies of BaTi1-xFexO3 Ceramics for x = 0.0 to 0.6 of Fe Doping Concentration

Sol–gel auto-ignition fabrication of Gd3+ incorporated Ni0.5Co0.5Fe2O4 multifunctional spinel ferrite nanocrystals and its impact on structural, optical and magnetic properties

Structural, microstructural and magnetic properties of sol–gel-synthesized novel BaZrO3–CoFe2O4 nanocomposite

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