Structural, magnetic and dielectric properties of nano-crystalline Ni-doped BiFeO3 ceramics formulated by self-propagating high-temperature synthesis

Abstract

Ni-doped BiFeO 3 powders with the composition BiFe 1x Ni x O 3 (x = 0.05, 0.1 and 0.15) were prepared by a self-propagating high-temperature synthesis (SHS), using metal nitrates as oxidizers and glycine as fuel. The X-ray diffraction (XRD) patterns depict that Ni-doped BiFeO 3 ceramics crystallize in a rhombhohedral phase. The scanning electron micrographs of Ni-doped BiFeO 3 ceramics show a dense morphology with interconnected structure. It is found that, the room-temperature magnetization measurements in Ni-incorporated

Study of the Structural and Electrical Properties of Cr-Doped BiFeO<sub>3</sub> Ceramic

“…This type of anomaly near the Neél temperature has also been predicted by several studies [20]- [25]. Figure 3 The leakage current versus the electric field was measured at room temperature to study the conduction mechanism of BiFe 1−x Cr x O 3 ceramic.…”

Multiferroic properties of nanocrystalline BiFe1−xNixO3 (x=0.0–0.15) perovskite ceramics

“…Recent studies by Kothari et al on the ferroelectric properties of the solid state synthesized BiFe 1 À x Ca x O 3 system proved that the leakage current increases with increment in Ca doping and leads to unsaturated hysteresis loops at room temperature [18]. We for the first time gazed our attention on prospective multiferroic properties of Ni doped BiFe 1 À x Ni x O 3 ceramics synthesized by the self propagating high temperature technique [11] where we demonstrated the emergence of nonzero magnetization at room temperature with saturated M-H loops at 5 K for Ni substituted BiFeO 3 . The dielectric measurements for Ni doped BiFeO 3 also demonstrated antiferromagnetic to paramagnetic phase transition mainly due to coupling between electric and magnetic dipoles of BiFeO 3 .…”

“…These includes information storage applications such as: nonvolatile, multiple state and ferroelectric random access memories; sensor applications which includes: spintronics and magnetoelectrics; applications in communications such as: radio, microwave, satellite communication and digital recording [5][6][7][8][9][10]. It also finds use in nonlinear optics, photoelectrochemical cell, high density thin film capacitor, electric field controlled ferromagnetic resonance devices and permanent magnet applications [11,12]. A multifunctional BiFeO 3 exhibit rhombhohedral perovskite structure with ferroelectric Curie temperature T C $ 1103 K and G-type antiferromagnetic Neel temperature T N $ 643 K [13,14].…”

“…To the best of our knowledge, this is the first attempt to investigate in details the effect of Ni doping on structural, morphological, ferroelectric and dielectric properties of BiFe 1 À x Ni x O 3 ceramics synthesized using solution combustion method (SCM) at higher sintering temperatures [11]. In this regard, the BiFe 1 À x Ni x O 3 (x ¼0, 0.05, 0.1, 0.15) ceramics were repeatedly synthesized by novel and simple solution combustion method to obtain optimal multiferroic properties.…”

Fusion bonding and microstructure formation in TiB2-based ceramic/metal composite materials fabricated by combustion synthesis under high gravity

“…Combustion synthesis which was also called self-propagating high-temperature synthesis (SHS) is being used to produce ceramics, intermetallics, and composite materials [11][12][13][14]. Based on this technology, joining a ductile metal with a brittle ceramic composite matrix has considerable potential for substantial improvements in fracture toughness [15].…”