Dr. S. V. Meenakshi – Resource for Physics and Materials Research

Dr. S. V. Meenakshi, Assistant Professor
Department of Physics, Sri Meenakshi Govt. Arts College for Women (Autonomous)
Madurai 625 002,
Mobile: 90801 49901,
Email: [email protected]

Ph.D. topic:

Synthesis and structural, dielectric, magnetic characterization of ceramic-ferrite magneto-electric composites

Date of Registration : 21/11/2014
Registration no. : P3734
Date of Submission of Thesis : 23/02/2022
Date of viva voce examination : 15/02/2024

Introduction about Ph.D. work:
The main objective of this work is the preparation and structural characterization of ceramic-ferrite magneto electric composites. At present (1-x)BaTiO3+xCoFe2O4 and (1-x)BaTiO3+xMgFe2O4 have been synthesized by conventional high temperature solid state reaction method using tubular furnace.

The prepared samples have been characterized using powder X-ray diffraction (PXRD) and analyzed using the powder profile refinement technique by adapting the software JANA 2006, to examine the structural properties. Effects of various compositions of ferroelectric and ferrite on the internal electronic structure, chemical bonding and charge density distribution are examined through maximum entropy method (MEM) by using PRIMA and VESTA.

Optical band gap (Eg) values are evaluated using UV-visible spectrophotometry (UV-vis). Microstructure and surface morphology are analyzed using scanning electron microscopy (SEM). Elemental compositions of the prepared ceramic systems are studied qualitatively and quantitatively by energy dispersive X-ray spectroscopy (EDS). My PhD work is going on and still there are two series to be synthesized and studied.

Materials interest:

Ceramics, ferrites, ferroelectric materials, Multiferroic materials

(1-x) BaTiO₃ + x CoFe₂O₄
(1-x) BaTiO₃ + x NiFe₂O₄
(1-x) BaTiO₃ + x ZnFe₂O₄
(1-x) BaTiO₃ + x MgFe₂O₄

List of Publications:

1.
Inter Bond Experimental Electron Density in Magnesium Ferrite
Ceramic (MgFe2O4) Through XRD,
M.J. Viswanath, M. Aysha kani, S.V. Meenakshi and R. Saravanan,
Materials Research Forum, Materials Research Foundations, USA, 
Vol.2 (Novel Ceramic Materials), Ch.3, 27-39, (2016). 
2.
Synthesis and Characterization of Al2TiO5-TiO2-Al2O3 Ceramics: Correlation with 
Charge Density,
S.V. Meenakshi, R. Saravanan, 
Novel Ceramic Materials,Materials Research Forum,
Materials Research Foundations, USA, 
Vol.2 (Novel Ceramic Materials), Ch.7, 81-92,(2016).
3.
Charge Density Analysis, Structural, Electrical and Magnetic Studies of 
(1-x)BaTiO3+NiFe2O4 Ceramic Composite, 
S.V. Meenakshi, R. Saravanan, N.Srinivasan, O.V.Saravanan, D.Dhayanithi, and 
Nambi Venkatesan Giridharan,
J.Electronic Materials (Springer),49,7349–7362 (2020)  
DOI: 10.1007/s11664-020-08481-4
(Impact Factor= 1.774),
4.
Exploration of (1 - x) BaTiO3 + x ZnFe2O4 magneto-electric ceramic composite on 
charge density: Structure and its characterization
S.V. Meenakshi, R. Saravanan, N. Srinivasan, D. Dhayanithi, N.V.Giridharan 
Journal of Alloys and Compounds (Elsevier), 888, 161491 (2021) 
(Impact Factor= 5.316)
5. 
Communicated 1
6.
Communicated 2