Magnetic and magnetocaloric properties of the exactly solvable mixed-spin Ising model on a decorated triangular lattice in a magnetic field
Abstract
The ground state, zero-temperature magnetization process, critical behaviour and isothermal entropy change of the mixed-spin Ising model on a decorated triangular lattice in a magnetic field are exactly studied after performing the generalized decoration-iteration mapping transformation. It is shown that both the inverse and conventional magnetocaloric effect can be found near the absolute zero temperature. The former phenomenon can be found in a vicinity of the discontinuous phase transitions and their crossing points, while the latter one occurs in some paramagnetic phases due to a spin frustration to be present at zero magnetic field. The inverse magnetocaloric effect can also be detected slightly above continuous phase transitions following the power-law dependence | - ΔSisomin | ∝hn, where n depends basically on the ground-state spin ordering.
- Publication:
-
Physica E Low-Dimensional Systems and Nanostructures
- Pub Date:
- May 2018
- DOI:
- 10.1016/j.physe.2018.01.017
- arXiv:
- arXiv:1802.00181
- Bibcode:
- 2018PhyE...99..244G
- Keywords:
-
- Ising model;
- Magnetization process;
- Spin frustration;
- Magnetocaloric effect;
- Exact results;
- Condensed Matter - Statistical Mechanics
- E-Print:
- 11 pages, 9 figures