Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ferroelectric domain patterns in barium titanate single crystals studied
  by means of digital holographic microscopy   In this Article, we report on the observation of ferroelectric domain pattern
in the whole volume of the ferroelectric barium titanate single crystal by
means of the digital holographic microscopy (DHM). Our particular
implementation of DHM is based on the Mach-Zehnder interferometer and the
numerical processing of data employs the angular spectrum method. A
modification of the DHM technique, which allows a fast and accurate
determination of the domain walls, i.e. narrow regions separating the
antiparallel domains, is presented. Accuracy and sensitivity of the method are
discussed. Using this approach, the determination of important geometric
parameters of the ferroelectric domain patterns (such as domain spacing or the
volume fraction of the anti-parallel domains) is possible. In addition to the
earlier DHM studies of domain patterns in lithium niobate and lithium
tantalate, our results indicate that the DHM is a convenient method to study a
dynamic evolution of ferroelectric domain patterns in all perovskite single
crystals.

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The categories of this paper are: nlin
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: astro-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph