Significant enhancement in structural, dielectric, piezoelectric and ferromagnetic properties of Ba0.9Sr0.1Zr0.1Ti0.9O3-CoFe2O4 multiferroic composites

[Display omitted] •(1-x)Ba0.9Sr0.1Zr0.1Ti0.9O3-(x)CoFe2O4 multiferroic composite has been synthesized using mechano-chemical activation technique.•An improvement in dielectric, ferroelectric and piezoelectric properties over the pristine BSZT sample has been observed.•The composite samples also show...

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Bibliographic Details
Published in:Materials research bulletin 2018-04, Vol.100, p.367-376
Main Authors: Jain, Aditya, Panwar, Amrish K., Jha, A.K.
Format: Article
Language:English
Subjects:
Ceramic
CHEMICAL ACTIVATION
COMPOSITE MATERIALS
CONCENTRATION RATIO
DIELECTRIC PROPERTIES
Ferrite
FERRITES
Ferroelectric
FERROELECTRIC MATERIALS
FERROMAGNETIC MATERIALS
GRAIN SIZE
IMPURITIES
MATERIALS SCIENCE
Multiferroic
PEROVSKITE
PIEZOELECTRICITY
X-RAY DIFFRACTION
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Summary:[Display omitted] •(1-x)Ba0.9Sr0.1Zr0.1Ti0.9O3-(x)CoFe2O4 multiferroic composite has been synthesized using mechano-chemical activation technique.•An improvement in dielectric, ferroelectric and piezoelectric properties over the pristine BSZT sample has been observed.•The composite samples also show a substantial enhancement in ferromagnetic characteristics compare to bare BSZT sample. Multiferroic composites (1 − x)Ba0.9Sr0.1Zr0.1Ti0.9O3-(x)CoFe2O4 (x = 0.0, 0.05, 0.10, 0.20 & 0.30) were prepared using mechanochemical activation method. Rietveld refined XRD patterns confirm the diphasic nature of composite samples. All of the diffraction peaks of (1 − x)BSZT-(x)CFO can be identified for the separate perovskite (BSZT) and inverse spinal (CFO) phases and no other impurity phase were observed for the composites. (1 − x)BSZT-(x)CFO sample with x = 0.05 have shown significant improvement in microstructural, dielectric, ferroelectric and piezoelectric properties over the pristine BSZT sample. Such an improvement in electrical properties can be attributed to larger grain size, improved density and easier ferroelectric domain wall motion inside the grain. Dielectric breakdown strength of the composites also shows a similar trend and is observed to be maximum for the sample with x = 0.05 CFO concentration. The composite samples also show a substantial enhancement in ferromagnetic characteristics and increases progressively with increase in ferrite (CFO) content.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2017.12.054