Critical properties of a 2D frustrated magnet with non-magnetic impurities

Abstract

We report on classical Monte Carlo study of phase transitions and critical behavior of a 2D spin-pseudospin model describing a dilute magnet with competing charge and spin interactions. The static critical exponents of the specific heat and correlation length are calculated using the finite-size scaling theory in a wide range of model parameters. The order of phase transitions is analyzed within the energy histogram method. It is found that approaching the frustration point and increasing the density of non-magnetic impurities leads to non-universal critical behavior and first-order phase transitions. Features of non-universal critical behavior are shown to depend on the relationship between the parameters of the spin and pseudospin interactions.

11 pages, 4 figures. IEEE Trans. on Magn. (2021)

References in corpus (4)

• Location of the Potts-critical end point in the frustrated Ising model on the square lattice
• Phase diagrams of a 2D Ising spin-pseudospin model
• Critical behavior of a 2D spin-pseudospin model in a strong exchange limit
• Specific Features of Phase States of a Diluted 2D Magnet with Frustration

Cited by in corpus (1)

• Pseudotransitions in a dilute Ising chain