Open AccessSpectroscopic analysis and temperature-dependent dielectric properties of bulk Ni–Zn ceramics
Author(s) -
Amulya Yadav,
Pankaj Choudhary,
Pallavi Saxena,
V. N.,
Ashutosh Mishra
Publication year - 2019
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x19500140
Subject(s) - dielectric , materials science , analytical chemistry (journal) , raman spectroscopy , lattice constant , spinel , conductivity , doping , ion , dielectric loss , crystal structure , ceramic , condensed matter physics , diffraction , crystallography , chemistry , optics , physics , metallurgy , organic chemistry , optoelectronics
In the present work, series of Zn ion-doped Ni[Formula: see text]Zn x Fe 2 O 4 ([Formula: see text]) ceramics were prepared by the double sintered solid-state reaction route to find out the influence of Zn[Formula: see text] ions on the crystal structure, lattice structure and dielectric behavior of parent NiFe 2 O 4 . X-ray diffraction (XRD) study favors that all the prepared compounds belong to the cubic spinel structure. Lattice parameters found to have increasing value with increased Zn[Formula: see text] ion substitution. The Raman scattering measurement discerns optical-active modes with blue shift as the doping increases. The dielectric constant ([Formula: see text] and dielectric tangent loss (tan [Formula: see text] decrease with an increase in frequency and at higher frequency, both become constant. Dielectric parameters observe nonlinear behavior with increasing Zn[Formula: see text] ion substitution. Room temperature dielectric constant of 10% Zn ion-doped NiFe 2 O 4 [Ni[Formula: see text]Zn[Formula: see text]Fe 2 O 4 ] is much higher as compared to other prepared ceramics. The room temperature ac conductivity is found to increase with increase in frequency and temperature-dependent ac conductivity increases with increase in temperature.