|
This article is cited in 3 scientific papers (total in 3 papers)
XXIV International Symposium Nanophysics and Nanoelectronics, Nizhny Novgorod, March 10-13, 2020
Phase transitions
Magnetocaloric effect in two-dimensional diluted Ising model: appearance of frustrations in the ground state
A. V. Shadrin, V. A. Ulitko, Yu. D. Panov Ural Federal University, Ekaterinburg
Abstract:
The magnetocaloric effect in a two-dimensional Ising model is considered for different ratios between parameters of inter-site repulsion of nonmagnetic impurities and exchange coupling. Classical Monte Carlo simulations on a square lattice show that in case of weak coupling and at sufficiently high concentrations of nonmagnetic impurities the long-range ferromagnetic ordering breaks down to give isolated spin clusters in the ground state of the system. This leads to appearance of a paramagnetic response in the system at the zero temperature and nonzero entropy of the ground state. The feasibility to detect frustration of ground state using data on the magnetic entropy variation is discussed.
Keywords:
magnetocaloric effect, 2D dilute Ising model, frustration.
Received: 26.03.2020 Revised: 26.03.2020 Accepted: 02.04.2020
Citation:
A. V. Shadrin, V. A. Ulitko, Yu. D. Panov, “Magnetocaloric effect in two-dimensional diluted Ising model: appearance of frustrations in the ground state”, Fizika Tverdogo Tela, 62:9 (2020), 1549–1554; Phys. Solid State, 62:9 (2020), 1719–1724
Linking options:
https://www.mathnet.ru/eng/ftt8331 https://www.mathnet.ru/eng/ftt/v62/i9/p1549
|
Statistics & downloads: |
Abstract page: | 56 | Full-text PDF : | 16 |
|