Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electro-optic and electrical properties in Hafnium-doped congruent
  lithium-niobate crystals   We report the optical and dielectric properties in hafnium (Hf)-doped lithium
niobate (LN) crystals. We investigated samples of congruent composition with
various doping concentration varying from 0 to 8 mol%. The clamped and
unclamped values of the electro-optic coefficient r 22 of Hf-doped LN and the
corresponding dielectric permittivity as well, have been experimentally
determined and compared with the results obtained in undoped congruent LN
crystals. We show that the electro-optic and dielectric properties are only
slightly affected by the introduction of hafnium ions, and therefore Hf-doped
LN has the advantage of low photorefractive damage compared with the undoped
congruent LN.

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The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph