Calcination temperature influenced multiferroic properties of Ca-doped BiFeO{sub 3} nanoparticles

Journal Article · Wed Jun 24 04:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4917835· OSTI ID:22490346

Dhir, Gitanjali; Uniyal, Poonam; Verma, N. K. ^[1]

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1. Nano Research Lab, School of Physics and Materials Science, Thapar University, Patiala-147004 (India)

The influence of Ca-doping and particle size on structural, morphological and magnetic properties of BiFeO{sub 3} nanoparticles has been studied. A sol-gel method was employed for the synthesis of nanoparticles and their particle size was tailored by varying the calcination temperature. Structural analysis revealed a rhombohedral distortion induced by Ca-substitution. The broadening of diffraction peaks with decreasing calcination temperature was indicative of reduction in crystallite size. The morphological analysis revealed the formation of agglomerated nanoparticles having average particle size ranging from 10-15 and 50-55 nm for C4 and C6, respectively. The agglomeration is attributed to high surface energy of nanoparticles. Ferromagnetism has been displayed by all the synthesized nanoparticles. Enhancement of saturation magnetization with Ca-substitution is attributed to suppression of spin cycloid structure by the reduction in size, lattice distortion and creation of oxygen vacancies by the substitution of divalent ion at trivalent site. Further, this value increases as a function of decreasing particle size. Strong particle size effects on magnetic properties of the synthesized nanoparticles are owed to increasing surface to volume ratio. All these observations are indicative of strong dependence of multiferroism on particle size.

• OSTI ID: 22490346
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1665; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH COMPOUNDS
CALCINATION
CALCIUM
DIFFRACTION
DOPED MATERIALS
FERRITES
FERROMAGNETISM
MAGNETIC PROPERTIES
MAGNETIZATION
NANOPARTICLES
PARTICLE SIZE
REDUCTION
SOL-GEL PROCESS
SURFACE ENERGY
SURFACES
SYNTHESIS
TEMPERATURE DEPENDENCE
TRIGONAL LATTICES
VACANCIES