Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic magnetic properties and crystal electric field studies on
  CePd$_2$Ge$_2$ single crystal   The anisotropic magnetic properties of the antiferromagnetic compound
CePd$_2$Ge$_2$, crystallizing in the tetragonal crystal structure have been
investigated in detail on a single crystal grown by Czochralski method. From
the electrical transport, magnetization and heat capacity data, the N\'{e}el
temperature is confirmed to be 5.1 K. Anisotropic behaviour of magnetization
and resistivity is observed along the two principal crystallographic directions
viz., [100] and [001]. The isothermal magnetization measured in the
magnetically ordered state at 2 K exhibits a spin re-orientation at 13.5 T for
field applied along [100] direction, whereas the magnetization was linear along
the [001] direction attaining a value of 0.94 $\mu_{\rm B}$/Ce at 14 T. The
reduced value of the magnetization is attributed to the crystalline electric
field (CEF) effects. A sharp jump in the specific heat at the magnetic ordering
temperature is observed. After subtracting the phononic contribution, the jump
in the heat capacity amounts to 12.5 J/K mol which is the expected value for a
spin ${1}{2}$ system. From the CEF analysis of the magnetization data the
excited crystal field split energy levels were estimated to be at 120 K and 230
K respectively, which quantitatively explain the observed Schottky anomaly in
the heat capacity. A magnetic phase diagram has been constructed based on the
field dependence of magnetic susceptibility and the heat capacity data.

8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph