Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dielectric anomalies induced by different mechanisms in
  Pb(Fe1/2Nb1/2)1-xTixO3 single crystals   We investigated the dielectric properties of Pb(Fe1/2Nb1/2)1-xTixO3 single
crystals below room temperature. Two dielectric anomalies were detected in
sample A while only one was detected in sample B in the temperature range
90~300 K. A Debye-like relaxation with strong frequency dispersion was detected
in both samples. The pre-edge XAFS suggests that this dielectric anomaly is
induced by the hopping conductivity between Fe2+ and Fe3+. The EXAFS results
give us a clear picture of the local structure of iron ions. The weak frequency
dependent dielectric anomaly only observed in sample A is supposed to be due to
the dipole glass behavior.

35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph