Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Investigation of the magnetic ground state of PrRu$_2$Ga$_8$ compound   We have investigated the ground state properties of the orthorhombic
structure compound PrRu$_2$Ga$_8$ through electronic and magnetic properties
studies. The compound crystallizes in the CaCo$_2$Al$_8$-type structure,
belonging to space group $Pbam$ (No. 55). The temperature dependence specific
heat shows a $\lambda$-type anomaly at $T_N$ = 3.3 K, indicating a bulk phase
transition probably of antiferromagnetic origin. At the N\'{e}el temperature
$T_N$, the entropy approaches the value of 4.66~J/mol.K which is about
0.8Rln(2), where R is the universal gas constant. The analysis of the low
temperature specific heat gives $\gamma$ = 46 mJ/mol.K$^2$. The temperature
dependence DC magnetic susceptibility $\chi(T)$ confirms the anomaly at 3.3 K
and follows the Curie-Weiss law for temperatures above 50~K, with the
calculated effective magnetic moment, $\mu_\mathrm{{eff}}$ = 3.47(2)~$\mu_B$/Pr
and Weiss temperature $\theta_p$ = --7.80(1)~K. This effective magnetic moment
value is in good agreement with the Hund$^\prime$s rule theoretical free-ion
value of 3.58~$\mu_B$ for Pr$^{3+}$. The electrical resistivity data also shows
an anomaly at $T_N$ and a broad curvature at intermediate temperatures probably
due to crystalline electric field (CEF) effects. The Pr$^{3+}$ in this
structure type has a site symmetry of $C_s$ which predicts a CEF splitting of
the $J$ = 4 multiplet into 9 singlets and thus rule out in principle the
occurrence of spontaneous magnetic order. In this article we discuss the
magnetic order in PrRu$_2$Ga$_8$ in line with an induced type of magnetism
resulting from the admixture of the lowest CEF level with the first excited
state.

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The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
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The categories of this paper are: stat
12
The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: gr-qc