Structural stability, enhanced magnetic, piezoelectric, and transport properties in (1-x)BiFeO3–(x)Ba0.70Sr0.30TiO3 nanoparticles

Multiferroic samples with composition (1-x)BiFeO3-(x)(Ba0.70Sr0.30)TiO3 (BFO-BST) were synthesized using a sol-gel route to study the effect of BST doping on structural, transport, and magnetic properties in BiFeO3 (BFO). X-ray diffraction studies with Rietveld analysis revealed that a phase transit...

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Bibliographic Details
Published inJournal of applied physics Vol. 123; no. 20
Main Authors Sharma, Subhash, Singh, Vikash, Anshul, Avneesh, Siqueiros, J. M., Dwivedi, R. K.
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 28.05.2018
Subjects
Antiferromagnetism
Applied physics
Bismuth ferrite
Crystal structure
Dielectric loss
Doping
Ferroelectric materials
Ferroelectricity
Ferromagnetism
Magnetic properties
Phase transitions
Piezoelectricity
Size effects
Sol-gel processes
Structural stability
Temperature dependence
Transmission electron microscopy
Transport properties
X-ray diffraction
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Summary:Multiferroic samples with composition (1-x)BiFeO3-(x)(Ba0.70Sr0.30)TiO3 (BFO-BST) were synthesized using a sol-gel route to study the effect of BST doping on structural, transport, and magnetic properties in BiFeO3 (BFO). X-ray diffraction studies with Rietveld analysis revealed that a phase transition occurred from rhombohedral (R3c) (0.0 ≤ × ≤ 0.15) to tetragonal (P4 mm) for x = 0.20 and nanocrystalline nature confirmed by transmission electron microscopy measurements. Piezoelectric properties improved as x increased from x = 0.0 (58 pC/N) to x = 0.20 (112 pC/N) increasing distortion in the crystal structure as evinced by Williamson-Hall analysis. Ferromagnetism was observed in doped BFO, different from the antiferromagnetic ordering in bulk BFO, indicating the noteworthy size effects and Fe-O-Fe bond angle variations in the magnetic ordering of BFO. An improvement in ferroelectric properties is observed with doping of BST compared to pristine BFO. Thermally activated conduction behavior occurred at low and high temperature regions as revealed by temperature dependent dc resistivity measurement. Effective improvements in dielectric response, meaning high dielectric constant with a low dielectric loss, were found in the doped samples.
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ISSN:0021-8979
1089-7550
DOI:10.1063/1.5023682