Phase diagram of the ferrimagnetic mixed-spin Blume-Capel model with four-spin and next-nearest neighbor interactions

3rd Euro-Mediterranean Conference on Materials and Renewable Energies

材料科学;能源学

Azhari, M.^1 ; Benayad, N.^1 ; Mouhib, M.^1

Laboratory of High Energy Physics and Scientific Computing, Hassan II University-Casablanca, Faculty of Sciences-Aïn Chock, B.P: 5366 Maarif, Casablanca

20100, Morocco^1

关键词: Blume-Capel models;    Finite clusters;    Four-spin interactions;    Nearest-neighbor coupling;    Next nearest neighbor interaction;    State equations;    Tricritical behavior;    Two dimensional square lattice;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/758/1/012004/pdf
DOI  :  10.1088/1742-6596/758/1/012004

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A finite cluster approximation based on a single cluster theory is developed for a ferrimagnetic mixed spin-1/2 and spin-1 Blume-Capel model with four-spin interaction J4and next-nearest neighbor couplings J'. The state equations are derived for the two-dimensional square lattice and the phase diagram is explored. We found that the system can exhibits both critical and tricritical behavior according to appropriate values of J', D and J4.