Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of LaNiO3 on the impedance and dielectric properties of CoFe2O4:
  a high temperature study   We report the high temperature impedance and dielectric measurement of the
nanocomposites comprising of CoFe2O4 (CFO) and LaNiO3 (LNO) by changing the
content of LaNiO3 (0, 5, 10 and 15 %). The aim of the present study is to
relate the structural defects expected at the interfaces of the composites with
the result of impedance and dielectrics. The result separately shows the grain,
grain boundary and electrode relaxation behaviour in the impedance and modulus
spectroscopy. As calculated using Arrhenius law it indicates a reduced
activation energy of the grain boundary in the presence of LNO compared to pure
CFO. This assists the charge carriers for short range hopping across the
boundary as reflected from ac conductivity. The dielectric constant at high
frequency side manifests the interband transition in both pure CFO and the
composite materials. The frequency of the transition can be tuned by LNO
content. Thus this detail study will help to understand the relaxation
phenomenon and dielectric behaviour in the presence of structural defects and
disorder.

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The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con