Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetocaloric effect in R2Ti3Ge4 (R = Gd, Tb and Er) Compounds   Heat capacity of polycrystalline R2Ti3Ge4 (R = Gd, Tb and Er) compounds
(Orthorhombic, Sm5Ge4-type, Space group Pnma) has been studied in the
temperature range of 1.8 K to 300 K in various applied magnetic fields. The
compounds with magnetic lanthanide elements show interesting low field
magnetism intrigued by possible presence of competing antiferromagnetic and
ferromagnetic interactions. The magnetocaloric effect in these compounds is
estimated from the field dependent heat capacity data. The magnetic entropy
change and the adiabatic temperature change in the vicinity of the magnetic
transition are found to be significant.

25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph