Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for pressure-induced tricriticality in Cr   The antiferromagnetic ordering of chromium has long been known for its
peculiar physical properties. One of them is the observation of the weak
first-order character of the N'eel transition that is explained by the lack of
a stable fixed point by Bak and Mukamel. Barak et al. predicted that by
lowering the symmetry of the order parameter by the application of uniaxial
pressure along the [110] direction changes the N'eel transition to
second-order. In a previous experiment by Fawcett et al., irreversible
broadening of the N\'eel transition was already observed between 160 bar and
300 bar, which could, however, be caused by plastic deformation. Using an
improved setup with reduced stress inhomogeneities we succeeded to increase the
pressure range until irreversible broadening is observed above 450 bar. Despite
the observed tripling of the intensity of the magnetic Bragg peak $[0, 0,
1-\delta]$ at $p_{[110]}\geq450\,$bar, indicating a single
$\bf{\text{Q}}_\pm$-domain state of the sample, no hints for a tricritical
point were observed.

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The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: stat