Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-resolution synchrotron XRD study of Zr-rich compositions of
  Pb(Zr_xTi_1-x)O_3 (0.525\leq x \leq 0.60): evidence for the absence of the
  rhombohedral phase   Results of Rietveld analysis of the synchrotron XRD data on Pb(Zr_xTi_1-x)O_3
(PZT) for 0.525\leqx\leq0.60 are presented to show the absence of rhombohedral
phase on the Zr-rich side of the morphotropic phase boundary (MPB). Our results
reveal that the structure of PZT is monoclinic in the Cm space group for
0.525\leq x\leq 0.60. The nature of the monoclinic distortion changes from
pseudo-tetragonal for 0.525\leqx\leq0.54 to pseudo-rhombohedral for x>0.54.

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The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
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The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics