Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Giant magnetocaloric effect near room temperature in the
  off-stoichiometric Mn-Co-Ge alloy   We report a giant magnetocaloric effect near room temperature in an
off-stoichiometric Mn-Co-Ge alloy, across the magnetostructural transition. The
isothermal entropy change accompanying this transition has a peak value of
nearly 40 J/kg-K near 297 K and a refrigerant capacity of 270 J/kg with the hot
end at 302.5 K and cold end at 293.5 K. We also present an experimental
protocol to avoid spurious peaks in the magnetocaloric effect across a sharp
first order magnetostructural transition, not confined to Mn-Co-Ge alone, where
metastability during the transition could influence the measured magnetization
and thus the estimated entropy change. The estimated entropy change in the
present off-stoichiometric Mn-Co-Ge alloy is possibly the highest reported
value near room temperature in undoped Mn-Co-Ge alloys and underlines the
potential of the alloy for technological applications in room temperature
magnetic refrigeration.

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The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas