Journal ArticleDOI
Synthesis and characterization of MnFe2O4–BiFeO3 multiferroic composites
Amit Kumar,K.L. Yadav +1 more
TLDR
In this paper, the mixed spinel-perovskite composites were examined by means of X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM).Abstract:
The mixed spinel–perovskite composites of x MnFe 2 O 4 –(1– x )BiFeO 3 with x =0, 0.1, 0.2, 0.3 and 0.4 were prepared by solid state reaction method. The structure and grain size were examined by means of X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), respectively. The XRD results showed that the composites consisted of spinel MnFe 2 O 4 and perovskite BiFeO 3 phases after being calcined at the temperature 950 °C for 2 h. The grain size ranged from 0.8 to 1 μm. Magnetization was found to increase with increasing concentration of ferrite content. The variation of dielectric constant and dielectric loss with frequency showed dispersion in the low frequency range. Magnetocapacitance was also observed in the prepared composites, which may be the sign of magnetoelectric coupling in the synthesized composites at room temperature.read more
Citations
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Journal ArticleDOI
Structural, dielectric, magnetic, and optical properties of Ni0.75Zn0.25Fe2O4–BiFeO3 composites
Nidhi Adhlakha,K.L. Yadav +1 more
TL;DR: The magnetoelectric composites of spinel ferrite Ni0.75Zn0.25Fe2O4 and BiFeO3 (BFO) have been prepared via hybrid processing route and significant enhancements have been observed in physical observables such as grain size, dielectric constant, magnetization and polarization in ferroelectric hysteresis loops.
Journal ArticleDOI
A comparative study on structural, dielectric and multiferroic properties of CaFe2O4/BaTiO3 core-shell and mixed composites
Tesfakiros Woldu,B. Raneesh,Binoy Krishna Hazra,S. Srinath,Padmanapan Saravanan,M. V. Ramana Reddy,Nandakumar Kalarikkal +6 more
TL;DR: In this paper, the presence of spinel-ferrite phases in both core-shell and mixed nanocomposites were confirmed by X-ray diffraction patterns and transmission electron microscopy.
Journal ArticleDOI
Dielectric and impedance spectroscopy of Ni doped BiFeO3-BaTiO3 electronic system
TL;DR: In this article, a nickel modified BiFeO3-BaTiO3 electronic system has been fabricated by using a high-temperature solid-state reaction process, and the dielectric and impedance characteristics of the prepared material have been studied in a wide range of frequency (1-1-MHz) at different temperatures (25-500°C).
Journal ArticleDOI
Effect of pH and annealing temperatures on structural, magnetic, electrical, dielectric and adsorption properties of manganese ferrite nano particles
TL;DR: Manganese ferrite (MnFe2O4) samples of good homogeneity were synthesized at pH 8 and pH 11 for different annealing temperatures through wet chemical synthesis by a co-precipitation method as mentioned in this paper.
Journal ArticleDOI
Magnetic, dielectric and magnetoelectric properties of CoFe2O4–Bi0.85La0.15FeO3 multiferroic composites
TL;DR: In this paper, multiferroic composite nanoparticles of CoFe2O4 and perovskite Bi 0.85La 0.15FeO3 were prepared by a two-step wet chemical procedure, combining co-precipitation and sol-gel techniques.
References
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Why Are There so Few Magnetic Ferroelectrics
TL;DR: In this paper, the fundamental physics behind the scarcity of ferromagnetic ferroelectric coexistence was explored and the properties of known magnetically ordered ferro-electric materials were examined.
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On the Dispersion of Resistivity and Dielectric Constant of Some Semiconductors at Audiofrequencies
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Ferroelectricity in a pure BiFeO3 ceramic
TL;DR: In this paper, the phase pure BiFeO3 was synthesized using the oxide mixing technique followed by leaching with dilute nitric acid, and X-ray diffraction pattern indicated that the sample is phase pure.
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Larger polarization and weak ferromagnetism in quenched BiFeO3 ceramics with a distorted rhombohedral crystal structure
TL;DR: In this paper, single-phase insulating BiFeO3 ceramics have been synthesized by a simple but effective method that conventional solid state reaction is followed immediately by quenching processing.
Journal ArticleDOI
Magnetoelectric interaction phenomena in materials
TL;DR: In this paper, the magnetoelectric effect in antiferromagnetic Cr2O3 was predicted by Dzyaloshinskii which was later experimentally confirmed by Astrov and Folenet al.