Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Role of Zinc and Niobium in the Giant Piezoelectric Response of
  PbZn1/3Nb2/3O3   Relaxor ferroelectric perovskites are highly polarizable and can exhibit
giant coupling between elastic strain and an applied electric field. Here, we
report an in situ extended X-ray absorption fine structure (EXAFS) study of a
PbZn1/3Nb2/3O3 (PZN) single crystal as a function of the electric field. We
show that the strong dipoles in the NbO6 octahedra bonds are aligned along the
four \textless{} 011 \textgreater{} directions close to the orientation of the
electric field, while a small reversible polar shift occurs for Zn in the
direction of the electric field, i.e., positive or negative. This reversible
Zn-O polar shift is proposed to play an important role in both the "easy"
switching of the ferroelectric polarization and the giant piezoelectric effect
in PZN.

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The categories of this paper are: plasm-ph
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol