Critical phenomena in a mixed spin-3/2 and spin-5/2 Ising ferro-ferrimagnetic system in a longitudinal magnetic field

Mixed Spin‐(3/2,7/2) Ising‐Type Ferrimagnet: Monte Carlo–Mean Field Treatment

“…This phenomenon does not occur in F systems. [ 56,84 ] The existence of these metastable states with very long lifetimes (larger than our MC runs) is not uncommon in systems with several competing magnetic orderings, with complicated ground state phase diagrams, and there is experimental evidence of their existence. [ 85,86 ] When the AF ordering prevails, independently of the external field, for the external field dominates such that the total magnetization decreases toward its saturation value where all the spins are parallel to the field.…”

“…MC computational techniques have proven to be efficient for the analysis of Ising‐type magnetic models. [ 54–56 ]…”

“…This abrupt change in the magnetization has been observed in other ferrimagnetic models in the presence of external fields. [56,[81][82][83] In Figure 12 for T > T c the magnetization goes to zero since h 0 ¼ 0 and all the jM T j curves in Figure 13 have the same saturation value as they should. The discontinuity in the magnetization at T k is due to a sudden simultaneous reversal of the spins of both sublattices as shown in Figure 14 where we plot the sublattice magnetizations.…”

“…MC computational techniques have proven to be efficient for the analysis of Ising-type magnetic models. [54][55][56] To simulate the system defined by the Hamiltonian in Equation 1, we apply a thermal bath-type algorithm where states are generated at random. Spins are randomly selected through the lattice, and are changed according to the Boltzmann probability.…”

Efectos de anisotropía de ion simple sobre un sistema ferrimagnético de espines enteros

“…En el caso que nos compete estudiaremos un ferrimagneto tipo Ising mixto de espines 𝑆 = 1 y 𝜎 = 2 estructurado en una red cuadrada. Cabe destacar que los modelos de Ising mixtos han probado ser de gran utilidad en la caracterización magnética de los complejos materiales magnéticos (De La Espriella, 2016;Žukovič and Bobák, 2016; Karimou and Bati, 2021), dado que se han obtenido interesantes resultados acerca de fenómenos críticos como comportamientos reentrantes, doblemente reentrantes y transiciones discontinuas (Magoussi et al, 2013;Temizer et al, 2016;De La Espriella et al, 2017), entre otros, en diversas redes cristalinas entre los que se destacan óxidos ferrimagnéticos amorfos con iones de Fe 3+ (Htoutou et al, 2004).…”