SURFACE PHASE DIAGRAMS OF SEMI-INFINITE FERRIMAGNETIC SYSTEM

Saida Zouhair, Mohamed Monkade, Abdelmoumen El Antari, Mohammed El Bouziani, Nabil Hachem and Mohamed Madani
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Saida Zouhair: Team of Theoretical Physics, Laboratory L.P.M.C., Faculty of Sciences, Chouaib Doukkali University, El Jadida, Morocco
Mohamed Monkade: Team of Theoretical Physics, Laboratory L.P.M.C., Faculty of Sciences, Chouaib Doukkali University, El Jadida, Morocco
Abdelmoumen El Antari: Team of Theoretical Physics, Laboratory L.P.M.C., Faculty of Sciences, Chouaib Doukkali University, El Jadida, Morocco
Mohammed El Bouziani: Team of Theoretical Physics, Laboratory L.P.M.C., Faculty of Sciences, Chouaib Doukkali University, El Jadida, Morocco
Nabil Hachem: #x2020;Laboratory of Industrial Techniques, Faculty of Sciences and Techniques, Sidi Mohamed Ben Abdellah University, Fez, Morocco
Mohamed Madani: #x2021;Department of Physics and Chemistry, CRMEF, Meknes, Morocco

Surface Review and Letters (SRL), 2021, vol. 28, issue 05, 1-18

Abstract: The three-dimensional semi-infinite mixed spin-1/2 and spin-3/2 ferrimagnetic Ising system with crystal field is investigated using the mean-field approximation and the Monte Carlo simulation. According to the ratio R of bulk and surface exchange interactions and the ratio Y of bulk and surface crystal fields, we have classified four qualitative types of phase diagrams characterized by the presence or absence of ordinary, extraordinary, surface and special phase transitions. The critical behavior of the surface and bulk magnetizations has also been highlighted in the vicinity of these different transitions. At low temperatures, two critical end-points appear in the bulk and on the surface in the ordered region limiting two successive first-order phase transitions. Furthermore, we have made a comparison with other works on similar models in pure or mixed versions.

Keywords: Semi-infinite; Ising; mixed spins; mean-field; Monte Carlo; phase diagram (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X21500256

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