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Your search keyword '"Brahmi, B. N."' showing total 4 results
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4 results on '"Brahmi, B. N."'

1. Study of the Ashkin Teller model with spins $S$ = $1$ and $\sigma$ = $3/2$ subjected to different crystal fields using the Monte-Carlo method

Author

Amimer, Z., Bekhechi, S., Brahmi, B. N., Boudefla, R., Ez-Zahraouy, H., and Rachadi, A.

Subjects
Condensed Matter - Statistical Mechanics
Abstract

Using the Monte-Carlo method, we study the magnetic properties of the Ashkin-Teller model (ATM) under the effect of the crystal field with spins $S = 1$ and $\sigma = 3/2$. First, we determine the most stable phases in the phase diagrams at temperature $T = 0$ using exact calculations. For higher temperatures, we use the Monte-Carlo simulation. We have found rich phase diagrams with the ordered phases: a Baxter $3/2$ and a Baxter $1/2$ phases in addition to a $\left\langle \sigma S\right\rangle$ phase that does not show up either in ATM spin 1 or in ATM spin $3/2$ and, lastly, a $\left\langle \sigma\right\rangle = 1/2$ phase with first and second order transitions., Comment: 10 pages, 10 figures

Published
2020
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2. MAGNETOCALORIC EFFECT IN FULL-HEUSLER Rh2SmIn COMPOUND BASED ON RARE EARTHS USING DFT AND MONTE CARLO STUDIES.

Author

Koudjeti, N. N., Brahmi, B. N., Kaddar, Y., Zair, A., Bekhechi, S., and Benyoussef, A.

Subjects
*RARE earth metals, *COOLING power (Meteorology), *MONTE Carlo method, *HIGH temperatures, *DENSITY functional theory
Abstract

Magnetocaloric refrigeration is an integral part of technology and is under constant investigation. In this regard, the characterization of the magnetocaloric materials used is of major concern. In this study, we used different approaches to better understand the mechanisms underlying the magnetic and magnetocaloric properties of Rh2S mIn Full-Heusler. A physical model is suggested to explain the magnetic interaction within this material. Utilizing the density functional theory, exchange couplings and magnetic phase stability in Rh2SmIn have been attempted as well in order to understand and clarify the various magnetic interactions in this compound. The magnetic and magnetocaloric properties were examined with Monte Carlo simulation (MCS) based on the Ising model. The transition temperature, magnetic entropy change, and relative cooling power (RCP) were computed and found to be in good agreement with experimental evidence. According to the results, Rh2S mIn is a good candidate to be used in magnetic refrigeration applications at high temperature. [ABSTRACT FROM AUTHOR]

Published
2023
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