Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Suppression of the antiferromagnetic order when approaching the
  superconducting state in a phase-separated crystal of K$_x$Fe$_{2-y}$Se$_2$   We have combined elastic and inelastic neutron scattering techniques,
magnetic susceptibility and resistivity measurements to study single-crystal
samples of K$_x$Fe$_{2-y}$Se$_2$, which contain the superconducting phase that
has a transition temperature of $\sim$31 K. In the inelastic neutron scattering
measurements, we observe both the spin-wave excitations resulting from the
block antiferromagnetic ordered phase and the resonance that is associated with
the superconductivity in the superconducting phase, demonstrating the
coexistence of these two orders. From the temperature dependence of the
intensity of the magnetic Bragg peaks, we find that well before entering the
superconducting state, the development of the magnetic order is interrupted, at
$\sim$42 K. We consider this result to be evidence for the physical separation
of the antiferromagnetic and superconducting phases; the suppression is
possibly due to the proximity effect of the superconducting fluctuations on the
antiferromagnetic order.

16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int