Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Role of coexisting ferromagnetic and antiferromagnetic phases on the
  magnetocaloric effect in metamagnetic Tb2Ni2Sn   We report the anomalous magnetocaloric behavior in the polycrystalline
compound Tb2Ni2Sn. The magnetization measurements show that this compound shows
multiple magnetic transitions, which are attributed to the coexistence of
ferromagnetic and antiferromagnetic phases at low temperatures. With increase
in field and temperature, the compound undergoes a metamagnetic transition to a
ferromagnetic state. In the temperature range where the antiferromagnetic phase
is dominant, it exhibits inverse (negative) magnetocaloric effect. At
temperatures close to the Neel temperature, the compound shows positive
magnetocaloric effect. Below the critical field needed for the metamagnetic
transition, the temperature variation of the magnetocaloric effect is seen to
be correlated with the ferromagnetic fraction.

37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat