Dielectric, ferroelectric and ferromagnetic properties of samarium doped multiferroic bismuth ferrite

Rhaman, M. M.; Matin, Md. Abdul; Hakim, M. A.; Islam, Md. Fakhrul

doi:10.1088/2053-1591/ab57c2

Cited by 26 publications

(14 citation statements)

References 35 publications

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“…However, synthesis of single-phase BiFeO3 without any secondary phases such as Bi2O3, Fe2O3, Bi2Fe4O9, Bi25FeO39 etc. is a big challenge with conventional methods [6]. And this multiferroic BiFeO3 exhibits variation of secondary phases, which are found at different annealing temperatures in sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Structural and Optical Characterization of Multiferroic BiFeO3 Nanoparticles Synthesized at Different Annealing Temperatures

Niloy¹,

Chowdhury²,

Anowar³

et al. 2020

J. Nano- Electron. Phys.

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Multiferroic BiFeO3 (BFO) synthesis without any secondary phase is a big challenge. In this work, BFO nanoparticles were prepared using the sol-gel method at three different annealing temperatures. In order to observe the structure of prepared nanoparticles, X-ray diffraction (XRD) was used. The lucid crystalline structure of pure BFO nanoparticles was confirmed by the XRD pattern. In XRD pattern of these BFO nanoparticles, a secondary phase (Bi2Fe4O9) was observed. A phase shift was noticed with increasing annealing temperature. To scrutinize the grain morphology of synthesized nanoparticles, field emission scanning electron microscopy (FESEM) was performed. Energy dispersive X-ray spectroscopy (EDS) analysis had also been done for three different annealing temperatures. With increasing annealing temperature from 500 to 700 °C, particle size increased from 151 nm to 318 nm and crystallite size increased from 30.6 nm to 54.3 nm. In order to measure diffuse reflectance, a UV/Vis/NIR spectrophotometer was used and then optical band gap (Eg) was determined. Band gap energy increased from 1.96 eV to 2.04 eV for the increment of annealing temperature from 500 to 700 °C. The annealing temperature of 500 °C was found to be the optimal condition for synthesizing BiFeO3 nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Structural and Optical Characterization of Multiferroic BiFeO3 Nanoparticles Synthesized at Different Annealing Temperatures

Niloy¹,

Chowdhury²,

Anowar³

et al. 2020

J. Nano- Electron. Phys.

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“…The lossy behavior and unsaturated P-E loops are associated with the considerable leakage in the sample, which may be understood from the ionic moments of Fe 3+ to Fe 2+ ions enabling the formation of oxygen vacancies. 77 − 80 Since the XPS data of our pure-phase BFO revealed the existence of Fe 2+ ions and oxygen vacancies, the BFO material may result in exhibiting a high leakage current, which might affect its ferroelectric property at room temperature. Hence, this high leakage current in the pure-phase BFO can contribute to poor ferroelectric and unsaturated P-E loops as shown in Figure 13 .…”

Section: Results and Discussionmentioning

confidence: 99%

“…In the previous works associated with the microwave-assisted hydrothermal synthesis of BFO, to the best of our knowledge, no group has focused on investigating the ferroelectric behavior of BFO. 81 As we can see from Figure 13 , the polarization value of the material increases with the applied electric field, so we attempted to use large electric fields in our experiments to investigate the ferroelectric property of the sample BFO in a broad range of electric fields to obtain the complete well-saturated P-E loops. However, because of the high leakage current in our sample, we could not go beyond 25 kV/cm in order to observe the saturation.…”

Section: Results and Discussionmentioning

confidence: 99%

Microwave-Assisted Solvothermal Route for One-Step Synthesis of Pure Phase Bismuth Ferrite Microflowers with Improved Magnetic and Dielectric Properties

et al. 2022

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The prototypical plum-free, one-phase multiferric ferrite BiFeO 3 (BFO) is solid, parallel, with a high ferroelectric Curie temperature and Neel temperature and antiferromagnetic and ferroelectric propagation. This work aims to synthesize pure-phase BFO in the quickest possible way. We followed the microwave-assisted solvothermal (MWAST) method to achieve pure-phase BFO in the shortest duration of 3 min. The experiment involves simple optimizations with KOH concentration and microwave power levels. The surface morphology along with magnetic properties of BFO synthesized via the MWAST method are altered with varying KOH concentrations and microwave (MW) power levels. Our X-ray diffraction findings reveal that the pure-phase BFO is formed at 800 W MW power, and the structural characterizations like transmission electron microscopy, field emission scanning electron microscopy with energy-dispersive X-ray analysis have displayed the formation of uniformly distributed spherical microflowers of pure-phase BFO exhibiting a single-crystalline nature. Besides, the magnetic measurements affirmed a reliable weak ferromagnetic behavior (magnetization ∼1.25 emu/g) in BFO synthesized at 800 W MW power. In addition, good dielectric behavior with low dielectric loss was accompanied by frequency-dependent dielectric studies indicating an excellent frequency response of the material, and also the room-temperature ferroelectric properties were studied using a ferroelectric analyzer. The polarization of pure-phase BFO increases with the applied electric field and exhibits unsaturated polarization–electric field loops due to leakage current. Moreover, the Fourier transform infrared spectrum of the synthesized material has indicated the pure-phase BFO, and the Raman data have elucidated the vibrational modes of BFO. Further, the analysis of X-ray photoelectron spectroscopy data has confirmed the presence of fewer Fe 2+ ions and oxygen vacancies in the pure-phase BFO. Therefore, the collective characterizations and detailed analysis of BFO material have revealed the uniqueness of the MWAST method in producing the pure-phase BFO in 3 min with improved magnetic and dielectric properties, and hence the BFO synthesized via the MWAST method can be a potential candidate for multiferroic applications.

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“…[36][37][38][39] Moreover, the current sol-gel auto-ignition method is time and energy-consuming because it required up to 12 hours to produce a fine powder of pure bismuth ferrite. [40][41][42] However, several studies described the auto-combustion route to synthesize bismuth ferrite, [14,28,[40][41][42][43] but it is rare to find collective studies on the effect of a diverse chelating agent on physicochemical properties of bismuth ferrite nanoparticles. Sharif, Muhammad Kashif, et al [15] used simple auto combustion route to fabricate a series of BiFe 1-x Hf (3/4)x O 3 nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…Since some of the chelating agents and solvents in the sol‐gel process lead to secondary phases such as Bi 2 O 3 , Bi 2 Fe 4 O 9 , Bi 25 FeO 40 , the choice of a chelating agent, and solvent plays an essential role in the formation of phase‐pure BFO [36–39] . Moreover, the current sol‐gel auto‐ignition method is time and energy‐consuming because it required up to 12 hours to produce a fine powder of pure bismuth ferrite [40–42] . However, several studies described the auto‐combustion route to synthesize bismuth ferrite, [14,28, 40–43] but it is rare to find collective studies on the effect of a diverse chelating agent on physicochemical properties of bismuth ferrite nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

Mhamad

Aziz

et al. 2020

ChemistrySelect

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Pure phase bismuth ferrite has been successfully prepared in this research using a modified method of sol-gel auto-ignition. This method is a fast and economical synthesis technique since it can produce fine as-synthesis powder for less than 4 hours. Also, the influences of diverse chelating agents on the physicochemical properties of the synthesized samples were examined using various characterization techniques. XRD revealed that pure bismuth ferrite nanoparticles with rhombohedral perovskite structure were produced by using ascorbic acid (AA) as a chelating agent. From the UV spectra, a blue shift observed in the presence of AA and citric acid (CA). Moreover, the specific surface area of the as-prepared BFO-EDTA, BFO-AA and BFO-CA samples was 1.694, 1.134 and 1.627 m 2 /g, respectively, consistent with the XRD findings. Raman analysis shows that the synthesized BFO samples exhibit 4 A1 and 8E modes confirming Rhombohedral R3c geometry of bismuth ferrite nanoparticles. Finally, FTIR spectra depicted three absorption peaks at 410, 450, and 548 cm À 1 corresponding to FeÀ O stretching and bending, respectively, which is a characteristic of FeO 6 octahedral in perovskite. The findings of this study would assist the researcher in the selection of chelating agents in the auto-combustion method for the processing of nanoparticles for particular applications.

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Dielectric, ferroelectric and ferromagnetic properties of samarium doped multiferroic bismuth ferrite

Cited by 26 publications

References 35 publications

Structural and Optical Characterization of Multiferroic BiFeO3 Nanoparticles Synthesized at Different Annealing Temperatures

Structural and Optical Characterization of Multiferroic BiFeO3 Nanoparticles Synthesized at Different Annealing Temperatures

Microwave-Assisted Solvothermal Route for One-Step Synthesis of Pure Phase Bismuth Ferrite Microflowers with Improved Magnetic and Dielectric Properties

Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

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