Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple Magnetic Structures of Correlated Ce-ions in Intermetallic
  CeAu2Ge2   Neutron diffraction measurements on a high quality single crystal of CeAu2Ge2
reveal two new magnetic structures that coexist with commensurate long range
antiferromagnetic order below the Neel temperature T_N ~ 14 K. The new magnetic
structures, which exhibit distinct temperature and field dependencies, are
described by both commensurate and incommensurate magnetic structures and
introduces new region in the H-T phase diagram. These new experimental
observations provide essential information for developing a universal
understanding of the magnetic properties of this class of Ce-based CeX2M2 (X =
Cu, Ag, Au; M = Ge, Si) compounds, which are prototypes for exploring quantum
phase transitions and their interplay with unconventional superconductivity.

30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org