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Ni-doped BiFeO3 powders with the composition BiFe1-xNixO3 (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 BiFeO3 ceramics crystallize in a rhombhohedral phase. The scanning electron micrographs of Ni-doped BiFeO3 ceramics show a dense morphology with interconnected structure. It is found that, the room-temperature magnetization measurements in Ni-incorporated BiFeO3 ceramics give rise to nonzero magnetization. The magnetization of Ni-doped BiFeO3 ceramics is significantly enhanced when Ni doping concentration reaches to x = 0.1 at 5 K. The variations of dielectric constant with temperature in BiFe0.95Ni0.05O3, BiFe0.9Ni0.1O3 and BiFe0.85Ni0.15O3 samples exhibit clear dielectric anomalies approximately around 450 ℃, 425 ℃ and 410 ℃ respectively, which correspond to antiferromagnetic to paramagnetic phase transition of the parent compound BiFeO3.


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

Show Author's information Yogesh A. CHAUDHARIa,bChandrashekhar M. MAHAJANcPrashant P. JAGTAPaSubhash T. BENDREa,*( )
Department of Physics, School of Physical Sciences, North Maharashtra University, Jalgaon 425001, India
Department of Engineering Sciences and Humanities (DESH), SRTTC-FOE, Kamshet, Pune 410405, India
Department of Engineering Sciences and Humanities (DESH), Vishwakarma Institute of Technology (VIT), Pune 411037, India

Abstract

Ni-doped BiFeO3 powders with the composition BiFe1-xNixO3 (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 BiFeO3 ceramics crystallize in a rhombhohedral phase. The scanning electron micrographs of Ni-doped BiFeO3 ceramics show a dense morphology with interconnected structure. It is found that, the room-temperature magnetization measurements in Ni-incorporated BiFeO3 ceramics give rise to nonzero magnetization. The magnetization of Ni-doped BiFeO3 ceramics is significantly enhanced when Ni doping concentration reaches to x = 0.1 at 5 K. The variations of dielectric constant with temperature in BiFe0.95Ni0.05O3, BiFe0.9Ni0.1O3 and BiFe0.85Ni0.15O3 samples exhibit clear dielectric anomalies approximately around 450 ℃, 425 ℃ and 410 ℃ respectively, which correspond to antiferromagnetic to paramagnetic phase transition of the parent compound BiFeO3.

Keywords: magnetic properties, self-propagating high-temperature synthesis (SHS), dielectric properties, X-ray diffraction (XRD), Ni-doped BiFeO3

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Publication history

Received: 18 August 2012
Revised: 02 March 2013
Accepted: 02 March 2013
Published: 04 June 2013
Issue date: June 2013

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© The author(s) 2013

Acknowledgements

This study was supported by UGC-SAP, DRS Phase II of India, and the author Y. A. Chaudhari is very much thankful for the funding agency.

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Open Access: This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

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