Nehru Boda 1, Kadiyala Chandra Babu Naidu 2, Khalid MujasamBatoo 3, G.Helen Ruth Joice 4, J. Laxman Naik 5, Dachepalli Ravinder 1,*
1Department of Physics, Osmania University, India
2Department of Physics, GITAM Deemed To Be University, Bangalore, India
3King Abdullah Institute for Nanotechnology, King Saud University, Saudi Arabia
4Thiru Kollanjiappar Arts College, India
5Department of Physics, University College of Science, Osmania University, India
*corresponding author e-mail address: ravindergupta28@rediffmail.com | Scopus ID 57190787725
Biointerface Research in Applied Chemistry, Volume 10, Issue 1, 2020, 4752 – 4763, https://doi.org/10.33263/BRIAC101.752763
ABSTRACT
Cadmium cobalt ferrite nanoparticles with a chemical formula of CdxCo1-xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5 & 0.6) (CCF) were prepared via the citrate-gel auto combustion method followed by annealing at 773 Kelvin for 4 hrs in air. Further, the samples were characterized for structural, morphological, elemental, functional group, electrical and thermoelectric properties analysis. The X-ray diffraction patterns showed the single phase cubic structure. The crystalline size of the synthesized Co-Cd ferrites nanoparticle is found in the range of 11 to17 nm. In addition, with an increase of Cd content, we noticed that lattice constants (a) and x-ray density (dx) values were increasing from 0.8419 – 0.8496 nm and 5.222 – 5.777 g/c.c., respectively. Morphological properties were examined by scanning electron microscopy (SEM) & Transmission electron microscopy (TEM). The tetrahedral (υ1) and octahedral (υ2) frequencies were observed at around 400 – 600 cm-1. The electric and dielectric properties such as DC-electrical conductivity (σdc), dielectric constant (ε’), dielectric loss (ε”) and thermoelectric power parameters were calculated. At a low temperature of 300 K, the samples express the p-type semiconducting nature due to having +ve value of ‘S’ while the same shows –ve value at high temperature suggesting the n-type semiconducting behavior. Moreover, the magnetic Curie-transition temperatures were determined as a function of composition and noted to be decreasing from 753 – 653 K respectively.
Keywords:Nanomaterials, Magnetic, Electronic Properties, Dielectrics.