Effect of concentration on lattice strain, dielectric properties and activation energy of CoFe2O4/BaTiO3 nanocomposites

• Published in: Applied physics. A, Materials science & processing Vol. 127; no. 6
• Main Authors: Dwivedi, U. K., Kumari, Manisha, Khan, Meenu, Pawar, Hariom, Singhal, Rahul, Rathore, Deepshikha
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2021; Springer Nature B.V
• Subjects: Activation energy; Applied physics; Barium titanates; Characterization and Evaluation of Materials; Cobalt ferrites; Condensed Matter Physics; Crystallites; Dielectric properties; Dissipation factor; Energy bands; Energy gap; Lattice strain; Machines; Manufacturing; Materials science; Nanocomposites; Nanoparticles; Nanotechnology; Optical and Electronic Materials; Optical properties; Physics; Physics and Astronomy; Processes; Surfaces and Interfaces; Thin Films; Dielectric constant; Nanocomposite; A.c. conductivity; Activation energy; Loss tangent
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-021-04577-8

The aim of this work was to develop the better combination of CoFe 2 O 4 (CFO) and BaTiO 3 (BTO) nanoparticles with enhanced dielectric properties. For this purpose, CFO/BTO nanocomposites at (0, 20, 40, 60, 80, and 100) wt% were synthesized using solid state method. The structural, optical and dielectric properties were investigated using the X-ray diffractometer, UV–Vis spectroscopy, and LCR meter respectively. The crystallite sizes of CFO and BTO were found to be 5.6 nm and 36.2 nm, respectively, by Scherrer’s formula. The uniform and nonuniform strains were determined using Hall method. The absorption edge and energy band gap were estimated from UV-B to visible range. The FESEM and EDX were used to confirm the crystallite size and pure formation of CFO/BTO nanocomposites with different concentration of BTO. The dielectric constant, dissipation factor and activation energy were observed higher for 20 wt% BTO as compared with other wt%, which is optimum combination of CFO/BTO nanocomposites.