Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Competing magnetic ground states and their coupling to the crystal
  lattice in CuFe2Ge2   Identifying and characterizing systems with coupled and competing
interactions is central to the development of physical models that can
accurately describe and predict emergent behavior in condensed matter systems.
This work demonstrates that the metallic compound CuFe$_2$Ge$_2$ has competing
magnetic ground states, which are shown to be strongly coupled to the lattice
and easily manipulated using temperature and applied magnetic fields.
Temperature-dependent magnetization $M$ measurements reveal a
ferromagnetic-like onset at 228(1)\,K and a broad maximum in $M$ near 180\,K.
Powder neutron diffraction confirms antiferromagnetic ordering below
$T_{\textrm{N}}\approx$175\,K, and an incommensurate spin density wave is
observed below $\approx$125\,K. Coupled with the small refined moments
(0.5-1\,$\mu_B$/Fe), this provides a picture of itinerant magnetism in
CuFe$_2$Ge$_2$. The neutron diffraction data also reveal a coexistence of two
magnetic phases that further highlights the near-degeneracy of various magnetic
states. These results demonstrate that the ground state in CuFe$_2$Ge$_2$ can
be easily manipulated by external forces, making it of particular interest for
doping, pressure, and further theoretical studies.

34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs