Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Barrier layer formation and PTCR effect in (1-x)
  Pb(Fe1/2Nb1/2)O3]-xPbTiO3 (x = 0.13) ceramics   (1-x)Pb(Fe1/2Nb1/2)O3-PbTiO3(PFN-xPT)Ceramics with x = 0.13 sintered at 1473K
show diffuse phase transition and very high dielectric constant at lower
frequencies.The high value of dielectric constant at lower frequencies is shown
to be due to the barrier layer formation.The resistivity of the PFN-xPT
ceramics, obtained by complex impedance analysis, initially decreases with
temperature and then shows an upward trend beyond the ferroelectric Curie point
reminiscent of BaTiO3 based thermistors with PTCR effect.

26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess