| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Yehia, Sherif
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Mechanical, electrical and self-healing properties of carbon fibre-reinforced ultra-lightweight ECCcitations
- 2023Development and evaluation of conductive ultra-lightweight cementitious composites for smart and sustainable infrastructure applicationscitations
- 2023First principles and mean field study on the magnetocaloric effect of YFe3 and HoFe3 compoundscitations
- 2023Shear performance of lightweight SCC composite beam internally reinforced with CFRP laminate stirrups and GFRP barscitations
- 2023Self-Consolidated Concrete-to-Conductive Concrete Interfacecitations
- 2023Shear strengthening performance of fiber reinforced lightweight SCC beamscitations
- 2022DEVELOPMENT OF HIGH STRENGTH CONCRETE WITH FINE MATERIALS LOCALLY AVAILABLE IN UAE
- 2022Performance of Different Concrete Types Exposed to Elevated Temperaturescitations
- 2022Effects of aggregate type, aggregate pretreatment method, supplementary cementitious materials, and macro fibers on fresh and hardened properties of high-strength all-lightweight self-compacting concretecitations
- 2021High strength flowable lightweight concrete incorporating low C3A cement, silica fume, stalite and macro-polyfelin polymer fibrescitations
- 2020Lap splices in confined self-compacting lightweight concretecitations
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article
First principles and mean field study on the magnetocaloric effect of YFe3 and HoFe3 compounds
Abstract
<jats:title>Abstract</jats:title><jats:p>In this work, the magnetothermal characteristics and magnetocaloric effect in YFe<jats:sub>3</jats:sub> and HoFe<jats:sub>3</jats:sub> compounds are calculated as function of temperature and magnetic field. These properties were investigated using the two-sublattice mean field model and the first-principles DFT calculation using the WIEN2k code. The two-sublattice model of the mean-field theory was used to calculate the temperature and field-dependences of magnetization, magnetic heat capacity, magnetic entropy, and the isothermal change in entropy ∆S<jats:sub>m</jats:sub>. We used the WIEN2k code to determine the elastic constants and, subsequently, the bulk and shear moduli, the Debye temperature, and the density-of-states at E<jats:sub>f</jats:sub>. According to the Hill prediction, YFe<jats:sub>3</jats:sub> has bulk and shear moduli of roughly 99.3 and 101.2 GPa respectively. The Debye temperature is ≈ 500 K, and the average sound speed is ≈ 4167 m/s. In fields up to 60 kOe and at temperatures up to and above the Curie point for both substances, the trapezoidal method was used to determine ∆S<jats:sub>m</jats:sub>. For instance, the highest ∆S<jats:sub>m</jats:sub> values for YFe<jats:sub>3</jats:sub> and HoFe<jats:sub>3</jats:sub> in 30 kOe are approximately 0.8 and 0.12 J/mol. K, respectively. For the Y and Ho systems, respectively, the adiabatic temperature change in a 3 T field decreases at a rate of around 1.3 and 0.4 K/T. The ferro (or ferrimagnetic) to paramagnetic phase change in these two compounds, as indicated by the temperature and field dependences of the magnetothermal and magnetocaloric properties, ∆S<jats:sub>m</jats:sub> and ∆T<jats:sub>ad</jats:sub>, is a second-order phase transition. The Arrott plots and the universal curve for YFe<jats:sub>3</jats:sub> were also calculated and their features give an additional support to the second order nature of the phase transition.</jats:p>