Thermomagnetic Behavior of a Ferrimagnet of High Spins: Monte Carlo Analysis

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

“…For example, properties such as internal energy, specific heat, and blocking temperatures of nanographene bilayers have been modeled by the 3/2-5/2 spin combination; [22,23] multicompensation phenomena have been found in many mixed systems. [24] The mixed spin-(5/2,7/2) structure presents some interesting thermomagnetic phenomena with useful technological applications, as evidenced by the works of Bahlagui et al, [25,26] Karimou et al, [27,28] and De La Espriella et al [29] Previous works on high-order spins models indicate that these systems present very rich magnetic behavior, such as multiloops hysteresis, superparamagnetism, that have been observed in real materials. [30,31] Most of these works have been performed with Hamiltonians that include antiferromagnetic (AF) interactions between nearest neighbors, crystal and external fields; [26] little is known about the added effect of next-nearest neighbor interactions that certainly are present and in many cases can be quite relevant as we will see.…”

“…For example, properties such as internal energy, specific heat, and blocking temperatures of nanographene bilayers have been modeled by the 3/2–5/2 spin combination; [ 22,23 ] multicompensation phenomena have been found in many mixed systems. [ 24 ] The mixed spin‐(5/2,7/2) structure presents some interesting thermomagnetic phenomena with useful technological applications, as evidenced by the works of Bahlagui et al, [ 25,26 ] Karimou et al, [ 27,28 ] and De La Espriella et al [ 29 ]…”

Hysteresis and Double‐Spin Compensation Behaviors in a Ferro‐Ferrimagnetic Model of High Half‐Integer Spins

“…[56] No less important are the investigations on the structural and magnetic characterizations of dilution effects in spin-7/2 crystalline structures, [57] as well as the research on the effects of crystal fields on the magnetic behavior in mixed systems containing spin-7/2. [58][59][60][61] This article is organized as follows: in Section 2, we define the ferro-ferrimagnetic model and briefly describe the MC method. The numerical results and the discussion are in Section 3.…”

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

“…Aparentemente el análisis termomagnético de un sistema de espines enteros, como el ferrimagneto tipo Ising con redes de momentos magnéticos 𝑆 = 1 y 𝜎 = 2, pareciera que no tiene importancia porque aún no se ha reportado en la literatura, hasta donde conocemos, ningún compuesto o material que contenga este tipo de espines o esté estructurado con ellos. Pero este trabajo se justifica por la variedad de fenómenos físicos que hemos hallado en este modelo, por ejemplo puntos de compensación (Tcomp), es decir temperaturas por debajo de la temperatura crítica (Tc) a la cual la magnetización total es cero, pero el sistema permanece ordenado (De La Espriella et al, 2019;De la Espriella et al, 2021;Kageyama et al,2003); transiciones discontinuas y continuas, las primeras muy útiles en las grabaciones magneto-ópticas y de gran interés práctico en el almacenamiento de datos magnéticos y su manipulación (Ostler et al, 2012;Barker et al, 2013) y las segundas, eficientes en la determinación de la transición de la fase ferrimagnética a la fase paramagnética, cuando el material se halla totalmente desordenado (De La Espriella et al, 2021). Además, los resultados teóricos obtenidos podrían servir como base de futuras investigaciones experimentales sobre compuestos con la configuración espintrónica 𝑆 = 1 y 𝜎 = 2.…”