Mean-Field and Monte Carlo Studies of the Magnetic Properties of a Spin-7/2 and Spin-5/2 Ising Bilayer Film

Journal Article · Sat Jun 15 00:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4876-4· OSTI ID:22921231

Karimou, M.; Ngantso, G. D. ^[1]; Hontinfinde, F. ^[2]; Benyoussef, A. ^[1]

---

1. Mohammed V University, LMPHE, Faculty of Sciences (Morocco)
2. Institute of Mathematics and Physical Sciences (IMSP) (Benin)

We use standard Monte Carlo simulations based on the Metropolis algorithm and mean-field calculations to investigate the magnetic properties of an Ising bilayer film consisting of two superposed ferromagnetic squared lattices A and B whose magnetic atoms have spin 7/2 and 5/2 respectively. Crystal-field and external magnetic field effects on the spins are considered in the model. The magnetic order parameters and response functions are calculated as functions of the temperature for selected values of the model parameters and this enables one to devise thermal phase diagrams by both methods. Our calculations only reveal second-order phase boundaries. Under appropriate conditions, compensation point phenomena are detected in the calculations below the critical temperatures. When the system is exposed to the external magnetic constraint, attracting hysteresis phenomena are sometimes generated. The temperature dependence of the coercitive field for various values of the crystal-field is singled out.

• OSTI ID: 22921231
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 6; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPUTERIZED SIMULATION
CRITICAL TEMPERATURE
CRYSTAL FIELD
FILMS
HYSTERESIS
ISING MODEL
LAYERS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MEAN-FIELD THEORY
MONTE CARLO METHOD
ORDER PARAMETERS
PHASE DIAGRAMS
RESPONSE FUNCTIONS
TEMPERATURE DEPENDENCE