Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic field induced antiferromagnetic tricritical points in Ce$_2 $Sb
  and Ce$_2 $Bi   We present a detailed investigation of the physical properties of Ce$_2 $Sb
and Ce$_2 $Bi single crystals, which undergo antiferromagnetic transitions at
around 8.2 and 10 K respectively. When magnetic fields are applied parallel to
the $c$ axis, metamagnetic transitions are observed at low temperatures,
corresponding to a magnetic field-induced phase transition. It is found that
the field-induced transition changes from second-order at higher temperatures,
to first-order at low temperatures, suggesting the existence of tricritical
points (TCPs) in both compounds. Since replacing Bi with Sb suppresses the TCP
to lower temperatures and corresponds to a positive chemical pressure, these
results suggest that applying pressure to Ce$_2$Sb may suppress the TCP to
lower temperatures, potentially to zero temperature at a quantum tricritical
point.

17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess