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Phase diagram of the mixed spin Ising model with four-spin interaction and nextnearest neighbor couplings


 
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1. Title Title of document Phase diagram of the mixed spin Ising model with four-spin interaction and nextnearest neighbor couplings
 
2. Creator Author's name, affiliation, country M. Mouhib; Laboratory of High Energy Physics and Scientific Computing, Hassan II University–Casablanca, Faculty of Sciences-Aïn Chock, B.P : 5366 Maarif, Casablanca 20100, Morocco.
 
2. Creator Author's name, affiliation, country M. Azhari; Laboratory of High Energy Physics and Scientific Computing, Hassan II University–Casablanca, Faculty of Sciences-Aïn Chock, B.P : 5366 Maarif, Casablanca 20100, Morocco.
 
2. Creator Author's name, affiliation, country N. Benayad; Laboratory of High Energy Physics and Scientific Computing, Hassan II University–Casablanca, Faculty of Sciences-Aïn Chock, B.P : 5366 Maarif, Casablanca 20100, Morocco.
 
3. Subject Discipline(s)
 
3. Subject Keyword(s) mixed spin Ising model, four-spin interactions, next-nearest neighbor, phase diagram.
 
4. Description Abstract

The phase diagrams of the ferromagnetic two-dimensional mixed spin-1 and spin-1/2 Ising model with four-spin interaction J4 and next-nearest couplings J’ are investigated by the use of the finite cluster approximation based on single-site cluster theory. The state equations are derived for the two-dimensional square lattice. The phase diagram is qualitatively and quantitatively different from that obtained when the interaction J’ is ignored. In fact, the system exhibits a variety of interesting features resulting from the introduction of the next-nearest neighbor interaction (NNN). It undergoes two kinds of behavior according to the negative and the positive value of J’. In particular, for J4/J2=-4, the system keeps the coexistence of the two ground state up to J’-dependent finite temperature.
 
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7. Date (YYYY-MM-DD) 07-08-2015
 
8. Type Status & genre Peer-reviewed Article
 
8. Type Type
 
9. Format File format PDF
 
10. Identifier Uniform Resource Identifier https://revues.imist.ma/index.php/MJCM/article/view/3232
 
11. Source Title; vol., no. (year) Moroccan Journal of Condensed Matter; Vol 17, No 1 (2015)
 
12. Language English=en en
 
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15. Rights Copyright and permissions Copyright (c)