Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Local environment and oxidation state of Mn impurity in SrTiO3
  determined from XAFS data   The local environment and oxidation state of Mn impurity in strontium
titanate doped with 3% Mn were studied by X-ray absorption fine structure
spectroscopy. The influence of the preparation conditions on the incorporation
of the impurity into the $A$ and $B$ sites was studied. It was established that
Mn ions substituting for Ti are in the Mn$^{4+}$ oxidation state and on-center.
Mn ions substituting for Sr are in the Mn$^{2+}$ oxidation state, are
off-center and displaced from the lattice sites by $\sim$0.32 {\AA}. It was
demonstrated that studies of the X-ray absorption near-edge structure can be
used to determine the concentration ratio of Mn atoms located at the $A$ and
$B$ sites.

7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
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
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin