ПРОЯВЛЕНИЕ ФРУСТРАЦИЙ ОСНОВНОГО СОСТОЯНИЯ ДВУМЕРНОЙ РАЗБАВЛЕННОЙ МОДЕЛИ ИЗИНГА В МАГНИТОКАЛОРИЧЕСКОМ ЭФФЕКТЕ

Resultado de pesquisa: Articlerevisão de pares

Resumo

The magnetocaloric effect is considered in the 2D dilute Ising model for various ratios of the parameters of inter-site repulsion of nonmagnetic impurities and exchange interaction. Numerical simulations using the classical Monte Carlo method on a square lattice shows that in the case of weak exchange at sufficiently high concentrations of nonmagnetic impurities, long-range ferromagnetic ordering is destroyed with the formation of isolated spin clusters in the ground state of the system. This leads to the appearance of a paramagnetic response of the system at zero temperature and a nonzero entropy of the ground state. In the paper, we discuss the possibility of detecting the frustration of the ground state using data on changes in magnetic entropy.
Título traduzido da contribuiçãoMANIFESTATION OF GROUND STATE FRUSTRATIONS OF THE TWO-DIMENSIONAL DILUTE ISING MODEL IN THE MAGNETOCALORIC EFFECT
Idioma originalRussian
Páginas (de-até)1549-1554
Número de páginas6
RevistaФизика твердого тела
Volume62
Número de emissão9 (91347)
DOIs
Estado da publicaçãoPublished - 2020

GRNTI

  • 29.00.00 PHYSICS

Level of Research Output

  • VAK List

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