Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polar and non-polar atomic motions in the relaxor ferroelectric PLZT
  from dielectric, anelastic and NMR relaxation   Dielectric, anelastic and ^139La NMR relaxation measurements have been made
on the relaxor ferroelectric Pb(1-3x/2)La(x)Zr(0.2)Ti(0.8)O(3) (PLZT) with x =
0.22. The dielectric susceptibility exihibits the frequency dispersive maximum
due to the freezing of the polar degrees of freedom around T ~250 K. The
anelastic and especially NMR relaxation, besides this maximum, indicate an
intense and broad component at lower temperatures, attributed to rotational
modes of the O octahedra, weakly coupled to the polar modes. It is discussed
why such short range rotational instabilities, known to occur in the Zr-rich
rhombohedral region of the PLZT phase diagram, might appear also in the Ti-rich
region.

8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga