Abdelmajid Ainane - Academia.edu (original) (raw)

Papers by Abdelmajid Ainane

SSRN Electronic Journal, 2022

Physica A: Statistical Mechanics and its Applications, 1999

Thin Solid Films, 2011

The transition properties of a ferroelectric thin film with seeding layers were studied using the... more The transition properties of a ferroelectric thin film with seeding layers were studied using the effective field theory with a probability distribution technique that accounts for the self-spin correlation functions. The effect of interaction parameters for the seeding layer on the phase diagram was also examined. We calculated the critical temperature and the polarization of the ferroelectric thin film for different seeding layer structures. We found that the seeding layer can greatly increase the Curie temperature and the polarization.

Applied Surface Science, 2022

Chinese Journal of Physics, 2009

The hysteresis loops, susceptibility, and pyroelectric coefficient of a ferroelectric or ferroele... more The hysteresis loops, susceptibility, and pyroelectric coefficient of a ferroelectric or ferroelectric bilayer system consisting of two monolayers (A and B) with different spins (S(subscript A)=σ=1/2 and S(subscript B)=S=3/2) in the presence of the crystal field in the monolayer B have been studied. Within an unusual mean-field theory based on the probability distribution technique that accounts for the self spin correlation functions, we discuss the effects of the external longitudinal electric field on the polarization, susceptibility, and pyroelectric coefficient of the cubic lattice. We show that by a choice of the temperature the hysteresis loops can be varied over a very wide range.

ACS Applied Energy Materials, 2021

Chinese Journal of Physics, 2007

Using the effective field theory with a probability distribution technique, we apply the Ising mo... more Using the effective field theory with a probability distribution technique, we apply the Ising model in a transverse field to analyse the properties of a KH2PO4/KD2H2PO4 superlattice. The on-site polarization and dielectric susceptibility, their mean values, the susceptibility, and the macroscopic pyroelectric coefficient are calculated for possible comparison with experimental data. We found for thick layer superlattices two peaks in the mean dielectric susceptibility and pyroelectric coefficient, as they had two phase transitions, whereas thin-layer superlattices show a one-peak behavior.

Using the modified transverse Ising model, and the effective field theory based on the probabilit... more Using the modified transverse Ising model, and the effective field theory based on the probability distribution technique, the phase transition temperature, the polarization and susceptibility for ferroelectric thin films with structural defects are studied. It is shown that the defect layers in ferroelectric thin films can induce strong increase or decrease of the critical temperature of ferroelectric phase transition due to different exchange interactions in the defect layers. The obtained results are in qualitative agreement with experimental data for thin ferroelectric film with different thickness.

Within the framework of the effective field theory, with a probability distribution technique tha... more Within the framework of the effective field theory, with a probability distribution technique that accounts for the single-site spin correlations, we examine the critical behavior of a diluted spin-1/2 Ising film. The critical temperature of the system is studied as a function of the thickness of the film, the concentration of magnetic atoms, the strength of the transverse field and the couplings. It is shown that for the ratio of the surface couplings to the bulk ones R = Js/J less than a critical value R,, the critical temperature of the film Tc/J is smaller than the bulk critical temperature Tc^B/J and for R ≥ Rc, Tc/J is larger than the bulk critical temperature Tc^B/J and Tc^S/J of the corresponding semi-infinite system. As the film thickness L is increased further Tc/J increases for R ≤ Rc (decreases for R 2 R,) and approaches asymptotically for large values of L the bulk critical temperature Tc^B/J (the surface critical temperature Tc^S/J) of the corresponding semi-infinite s...

Technische Universita¨t Chemnitz, 09107 Chemnitz, Germany(Received March 4, 2006)The characterist... more Technische Universita¨t Chemnitz, 09107 Chemnitz, Germany(Received March 4, 2006)The characteristic inﬂuence of the exchange interactions and amorphization at the surfaceon the critical behavior of a ferromagnetic Ising ﬁlm is examined, by the use of eﬀective ﬁeldtheory with a probability distribution technique that accounts for the self spin correlations.Depending on the ratio of the surface exchange interactions to the bulk ones, R = J

Using the transverse Ising model, we investigate the dielectric properties and the hysteresis beh... more Using the transverse Ising model, we investigate the dielectric properties and the hysteresis behavior of multi-surface ferroelectric (MSF) thin films in the framework of the effective field theory based on the probability distribution technique that accounts for the self-spin correlation functions. The effects of the exchange interactions and the transverse field on the longitudinal and the transverse polarizations, the dielectric susceptibility, the pyroelectric coefficient, and the hysteresis loops are studied. A number of interesting phenomena have been found.

Some Magnetic Properties of the Amorphous Transverse Spin-12 Ising System I. Essaoudi,1 F. Dujard... more Some Magnetic Properties of the Amorphous Transverse Spin-12 Ising System I. Essaoudi,1 F. Dujardin,2 A. Ainane,1, 3, ∗ M. Saber,1, 3, 4 and J. Gonzalez4 Laboratoire de Physique des Matériaux et Modélisation des Systémes (LP2MS), Unité Associée au CNRST, Physics Department, Faculty of Sciences, University of Moulay Ismail, B.P. 11201, Meknes, Morocco Laboratoire de Physique des Milieux Denses (LPMD) Institut de Chimie, Physique et Matériaux (ICPM), 1 Bd. Arago, 57070, Metz, France Max-Planck-Institut für Physik Complexer Systeme, Nöthnitzer Str. 38 D-01187 Dresden, Germany Basque Country University, Material Physics Dept. (UPV/EHU) Paseo Manuel de Lardizabal, 3, San Sebastian, 20018, Spain (Received May 22, 2009)

2018 6th International Renewable and Sustainable Energy Conference (IRSEC)

The EffectiveField Theory with correlations (EFT) based on the probability distribution is used t... more The EffectiveField Theory with correlations (EFT) based on the probability distribution is used to investigate the magnetic hysteresis behaviors of both hexagonal and square 2D nanoparticles consisting of a ferromagnetic spin-1/2 core and a ferromagnetic spin-l shell. The system parameters such as the ferrimagnetic exchange core/shell interaction, the surface shell exchange coupling and the reduced temperatureare examined on the magnetic hysteresis behaviors. Some interesting results have been found such as multiple hysteresis loop behaviors.

ACS Applied Energy Materials

The emergence of compact lithium-sulfur (Li-S) batteries with improved performances is becoming o... more The emergence of compact lithium-sulfur (Li-S) batteries with improved performances is becoming one of the most desirable aspects of future energy technologies. Beyond Li-ion batteries, Li-S is of great relevance to follow as it adapts to the specificity of each application. It is among the most suitable elements for high-performance energy storage systems, given its high theoretical capacity (1674 mA h g(-1)) and energy density (2600 W h kg(-1)) relative to Li-ion batteries (300 W h kg(-1)). Nevertheless, the high-cell polarization and the shuttle effect constitute an enormous challenge toward the concrete applications of Li-S batteries. In the framework of this work, density functional theory calculations have been carried out to analyze the potential of h-BAs nanosheets as a promising host material for Li-S batteries. Binding and electronic characteristics of lithium polysulfides (LiPSs) adsorbed on h-BAs surface have been explored. Reported findings highlight the potential of the hBAs monolayer as a moderate host material, given that the binding energies of different LiPSs vary from 0.47 to 3.55 eV. More detailed analysis of the complex binding mechanisms is carried out by investigating the components of van der Waals physical/chemical interactions. The defected surface of the h-BAs monolayer has optimum binding energies with LiPSs for Li-S batteries. All these findings provide valuable insights into the binding and electronic characteristics of the h-BAs monolayer as a moderate host material for Li-S batteries.

Superlattices and Microstructures