Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 7Li NMR, magnetic susceptibility, and heat capacity studies on the
  triangular lattice system LiCrO2   We report 7Li NMR, magnetic susceptibility, and heat capacity measurements on
the triangular lattice Heisenberg antiferromagnet compound LiCrO2. We find that
in contrast to NaCrO2, magnetic properties of LiCrO2 have a more pronounced
three dimensional character with sharp anomalies in the temperature variation
of the 7Li NMR intensity and the NMR spin-lattice relaxation rate 1/T1. From
heat capacity measurements we find that the total entropy related to the
magnetic transition is in agreement with expectations. However, we find a
significant contribution to the magnetic entropy in the range from the ordering
temperature T_N to nearly 4T_N. This suggests the existence of magnetic
correlations at temperatures well above T_N which might be due to the
frustrated nature of the system. Based on the temperature dependence of 1/T1,
we discuss the possible occurrence of a Kosterlitz-Thouless-Berezinskii
transition taking place at T_KTB = 55 K in LiCrO2. Lithium depletion has no
significant effect on the magnetic properties and the behaviour of Li0.5CrO2 is
nearly unchanged from that of LiCrO2.

37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int