Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Intrinsic ferroelectric properties of strained tetragonal PbZr0.2Ti0.8O3
  obtained on layer-by-layer grown, defect-free single crystalline films   PbZrxTi1-xO3 (PZT) is one of the technologically most important ferroelectric
materials. Bulk single-domain single crystals of PZT have never been
synthesized for a significant compositional range across the solid-solution
phase diagram. This leaves the fundamental properties of PZT under debate.
Synthesis of defect-free single crystalline films enables us to unambiguously
determine the intrinsic quantities that describe ferroelectric materials, such
as spontaneous polarization and dielectric constant. Defect-free single
crystalline, strained PbZr0.2Ti0.8O3 thin films were grown by pulsed-laser
deposition (PLD) onto vicinal SrTiO3 (001) single crystal substrates. Single
crystalline SrRuO3 films fabricated by PLD were employed as bottom electrode.
The PZT films have square shape hysteresis loops and remnant polarization
values of up to Pr= 110 micro C/cm2, which is considerably higher than the
theoretical value predicted for (unstrained) bulk single crystalline PZT of the
investigated composition. The films have a dielectric constant eps33= 90 and a
piezoelectric coefficient d33= 50 pm/V.

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The categories of this paper are: stat
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph