السعة الحرارية والطاقة الداخلية لنظام فيري مغناطيسية مختلط من  الرتبة ( 2 , 7/2)

Mohamed Ganebr; Omar  Farhat; Abdulbast  Elgwel; Mohamed  Alkadar; Sauad  Alshkawe; Zahra   Alwasea

doi:10.59743/aujas.v5i1.1611

Authors

Mohamed Ganebr Physics Department, Faculty of Science, Alasmarya Islamic University, Libya
Omar Farhat Physics Department, Faculty of Science, Alasmarya Islamic University, Libya
Abdulbast Elgwel Physics Department, Faculty of Science, Alasmarya Islamic University, Libya
Mohamed Alkadar Physics Department, Faculty of Science, Alasmarya Islamic University, Libya
Sauad Alshkawe Physics Department, Faculty of Education, Elmergib University, Libya
Zahra Alwasea Physics Department, Faculty of Science, Alasmarya Islamic University, Libya

DOI:

https://doi.org/10.59743/aujas.v5i1.1611

Keywords:

Ferrimagnetic system, Critical temperatures, Heat Capacity, First order phase transition, Mono crystal field

Abstract

This research studies Ising model of ferri-magnetic of order (2,7/2) by using mean-field theory which based on Bogoliuboy inequality for free energy, and the initial energy equation for interval points between the system order has been used and got zero scheme (ground). The magnetic momentum equations of sublattice (A) and sublattice (B), points of phase transforms of first order and second order, energy equation, the specific heat capacity and the specific heat capacity that varies at its change in the temperatures for the total lattice have been obtained.

By drawing the magnetic momentum curves for sublattice (A) and sublattice (B), distinctive and different curves at physical behavior and some interval points have appeared between magnetic phases at the specific heat capacity values. These indicate that the points are latent heat points for the system, and drawing the curves of specific heat capacity are found the various in behavior by the different mono-crystal field at sublattice.

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