Journal
PHYSICA SCRIPTA
Volume 98, Issue 10, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1402-4896/acf967
Keywords
La2NiO4; dielectric constant; negative permittivity; electrical conductivity; ruddlesden-popper phase
Categories
Ask authors/readers for more resources
This study investigates the dielectric properties of La2NiO4 and discovers its negative permittivity behavior, making it a potential candidate for electronic and electromagnetic devices in the radio-frequency range.
Materials showing negative permittivity have attracted considerable attention from researchers on account of their notable applications in electronic and electromagnetic devices. Discovering materials exhibiting negative permittivity is a challenging task. Very few single-phase oxides have been reported as negative permittivity materials. In this work, we have attempted to investigate the dielectric properties of La2NiO4 to explore the possibility of negative permittivity. To achieve the goal, powder, and ceramic of La2NiO4 have been synthesized by the conventional solid-state reaction method. Rietveld refinement of the X-ray diffraction data studies has confirmed the tetragonal structure and space group I4/mmm. The Dielectric properties and ACconductivity have been studied in the frequency range of 20 Hz-2 MHz and over a wide temperature range (30 degrees C-600 degrees C). The permittivity of La2NiO4 is found to be negative at all the measured frequencies and temperatures. The Drude model fitted the experimental data very well, suggesting that negative permittivity behavior can be assigned to the plasma oscillation of conducting electrons. The trend ofACconductivity with frequency is similar to the skin effect observed in metals. The variation ofDCconductivity with temperature indicated small polaron hopping conduction mechanism. Analysis of reactance (Z'') suggested inductive electrical character in the tested frequency and temperature range. Room temperature negative permittivity behavior of La2NiO4 makes it a potential candidate for practical electronic and electromagnetic devices that work in the Radio-frequency range. Furthermore, this work will add a new member to the family of Perovskite oxides showing tunable negative permittivity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available