Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of Exchange Bias in Antiferromagnetic Cr$_{0.79}$Se due to
  the Coexistence of Itinerant Weak Ferromagnetism at Low-temperatures   We report on the structural, electrical transport, and magnetic properties of
antiferromagnetic transition-metal monochalcogenide Cr$_{0.79}$Se. Different
from the existing off-stoichiometric compositions, Cr$_{0.79}$Se is found to be
synthesised into the same NiAs-type hexagonal crystal structure of CrSe.
Resistivity data suggest Cr$_{0.79}$Se to be a Fermi-liquid-type metal at low
temperatures, while at intermediate temperatures the resistivity depends
sublinearly on the temperature. Eventually, at the elevated temperatures the
rate of change of resistivity rapidly decreases with increasing temperature.
Magnetic measurements suggest a transition from paramagnetic phase to an
antiferromagnetic phase at a N$\acute{e}$el temperature of 225 K. Further
reduction of the sample temperature results into coexistance of weak
ferromagnetism along with the antiferromagnetic phase below 100 K. As a result,
below 100 K, we identify significant exchange bias due to the interaction
between the ferro- and antiferromagnetic phases. In addition, from the
temperature dependent X-ray diffraction measurements we observe that the
NiAs-type structure is stable up to as high as 600$^o$C.

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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
0
The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
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The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th