Title
Optical, Electrical and Magnetic Properties of Dy-Substitution on BiFeO3 Nanoparticles
Authors
Muneeswaran Muniyandi,*a Gopiraman Mayakrishnanb and N. V. Giridharan*c
aMechanical Engineering, University of Chile, Beauchef 851, Santiago, Chile
bDepartment of Applied Bioscience, College of Life & Environment Science, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, South Korea
cAdvanced Functional Materials Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India
*Corresponding Author Email Address : munisphysics@gmail.com (Muniyandi Muneeswaran)*a; giri@nitt.edu(N. V. Giridharan)*c
Article History
Published details: Received: 25th February 2019, Revised: 10th March 2019, Accepted: 18th March 2019, Published: 18th March 2019
Cite this article
Muneeswaran M.; Gopiraman M.; Giridharan N.V. Optical, Electrical and Magnetic Properties of Dy-Substitution on BiFeO3 Nanoparticles. Nano Prog., 2019, 1(1), 16-21.
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Abstract
[Bi1-xDyxFeO3, x=0.05 (BDF1), Bi1-xDyxFeO3, x=0.10 (BDF2), and Bi1-xDyxFeO3, x=0.15 (BDF3)] nanoparticles have been successfully synthesized by co-precipitation method. From X-ray diffraction data analysis confirms the phase formation and structural transformation from rhombohedral structure to orthorhombic when increase in the Dy concentration into BFO with evidence of Rietveld refinment analysis. The average crystallite sizes were calculated from X-ray diffraction analysis for BDF1, BDF2 and BDF3 were found to be 48, 33, 28 and 26 nm respectively. The band gap values of the BDF1, BDF2 and BDF3 samples using Kubelka– Munk (K-M) function evaluated from the diffuse reflectance spectra studies values are 2.27, 2.57 and 2.59 eV, respectively. Differential Thermal Analysis (DTA) shows the existence of two prominent peaks related to ferroelectric ordering and melting point of Dy substituted BFO. From the magnetic measurement for BDF1 showed antiferromagnetic behaviour and for BDF2 and BDF3 samples shows weak ferromagnetic behaviour. Further, we have demonstrated the magneto electric effect for the all the samples.
Keywords
BiFeO3; Co-Precipitation; Optical; Magnetic materials
