Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin
  films using planar electrodes   Epitaxial strain plays an important role in determining physical properties
of perovskite ferroelectric oxide thin films. However, it is very challenging
to directly measure properties such as polarization in ultrathin strained films
using traditional sandwich capacitor devices, because of high leakage current.
We employed a planar electrode device with different crystallographical
orientations between electrodes along different electric field orientation to
directly measure the in-plane polarization-electric field (P-E) hysteresis
loops in fully strained thin films. At high misfit strains such as -4.4%, the
pure Tetrogonal-like phase is obtained and its polarization vector is
constrained to lie in the (010) plane with a significantly large in-plane
component, ~44 {\mu}C/cm2. First-principle calculations are carried out in
parallel, and provide a good agreement with the experimental results. Our
results pave the way to design in-plane devices based on T-like BFO and the
strategy proposed here can be expanded to study all other similar strained
multiferroic ultrathin films.

17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
18
The categories of this paper are: econ