Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermodynamics of a model solid with magnetoelastic coupling   In the paper a study of a model magnetoelastic solid system is presented. The
system of interest is a mean-field magnet with nearest-neighbour ferromagnetic
interactions and the underlying s.c. crystalline lattice with the long-range
Morse interatomic potential and the anharmonic Debye model for the lattice
vibrations. The influence of the external magnetic field on the thermodynamics
is investigated, with special emphasis put on the consequences of the
magnetoelastic coupling, introduced by the power-law distance dependence of the
magnetic exchange integral. Within the fully self-consistent, Gibbs
energy-based formalism such thermodynamic quantities as the entropy, the
specific heat as well as the lattice and magnetic response functions are
calculated and discussed. To complete the picture, the magnetocaloric effect is
characterized by analysis of the isothermal entropy change and the adiabatic
temperature change in the presence of the external pressure.

36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th