Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dielectric and polarization experiments in high loss dielectrics: a word
  of caution   The recent quest for improved functional materials like high permittivity
dielectrics and/or multiferroics has triggered an intense wave of research.
Many materials have been checked for their dielectric permittivity or their
polarization state. In this report, we call for caution when samples are
simultaneously displaying insulating behavior and defect-related conductivity.
Many oxides containing mixed valent cations or oxygen vacancies fall in this
category. In such cases, most of standard experiments may result in effective
high dielectric permittivity which cannot be related to ferroelectric
polarization. Here we list few examples of possible discrepancies between
measured parameters and their expected microscopic origin.

25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics