Search Results - "Koumina, A."

Improved conductivity and reduced dielectric loss of Cu- substituted NiFe2O4 for high frequency applications by Chouaibi, H., Khelifi, J., Benali, A., Dhahri, E., Valente, M.A., koumina, A.

“…To promote suitable materials to be helpful for the electrical devices at high frequency application, we elaborated Cu substituted NiFe2O4 [NiFeCuO4 (NFCO)] by…”
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Modeling and simulation of complex flows using Basset digital filters by Lahboub, D., Bakak, A., Lotfi, M., Heyd, R., Koumina, A.

“…Taking into account the Basset force (memory term), in the balance of the forces exerted on a colloidal particle (CP) suspended in a fluid, results in an…”
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Crystal structure, vibrational and optical properties of a new self-organized material containing iodide anions of bismuth(III), [C₆H₄(NH₃)₂]₂Bi₂I₁₀·4H₂O by Hrizi, C, Samet, A, Abid, Y, Chaabouni, S, Fliyou, M, Koumina, A

“…Bismuth-iodide type zero-dimensional (0-D) organic/inorganic hybrid compound [C₆H₄(NH₃)₂]₂Bi₂I₁₀·4H₂O was synthesized and characterized by single-crystal X-ray…”
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Magneto-Structural Studies of 2-(2-Ammoniumethyl)-1-méthyl Pyrrolidinium Tetrachlorocuprate (II) by Amamou, W., Triki, M., Dhahri, E., Zouari, F., Koumina, A., Fliyou, M.

“…The (C 7 H 18 N 2 )CuCl 4 compound crystallized in the orthorhombic system with space group P 2 1 2 1 2 1 and the following unit cell are: a =7.353(3), b…”
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On the magnetocaloric effect in d-metal pnictides by Fruchart, D., Allab, F., Balli, M., Gignoux, D., Hlil, E.K., Koumina, A., Skryabina, N., Tobola, J., Wolfers, P., Zach, R.

“…Recently, the potentialities to develop large magnetocaloric contributions close to room temperature were pointed out in MnFe(As,P). Here, we aim to better…”
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Correlation between magnetic and electrical properties of the superparamagnetic La0.6Ca0.4MnO3 compound by Gharsallah, H., Jeddi, M., Bejar, M., Dhahri, E., Koumina, A.

“…•Correlation between the electrical and the magnetic properties was proposed.•At low temperatures, conduction was described by the electron-magnon…”
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Critical behavior near the ferromagnetic to paramagnetic phase transition temperature in polycrystalline La0.7Ca0.2Sr0.1Mn1−xCrxO3 (x=0.15 and 0.2) by Dhahri, Ah, Jemmali, M., Hussein, M., Dhahri, E., Koumina, A., Hlil, E.K.

“…•These samples have been prepared by solid–solid method.•The samples crystallize in the orthorhombic Pnma structure.•Results show that the…”
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Ab initio studies of the electronic structure induced by the CO and N2 adsorptions on graphene and on graphite slab by Sellam, A., Heyd, R., Hlil, E.K., Koumina, A., Hadaoui, A.

“…In this paper, we present an Ab initio study on the electronic properties of graphene and graphite slabs, using band structure and density of states…”
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Numerical modeling of p-i-n GaAs solar cell performance by Chahid, E.

“…This study aims to improve and evaluate the external quantum efficiency (EQE) of p-i-n GaAs solar cells. The current densities of minority carriers and the…”
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Magnetism of Fe2P investigated by neutron experiments and band structure calculations by Tobola, J., Bacmann, M., Fruchart, D., Kaprzyk, S., Koumina, A., Niziol, S., Soubeyroux, J.-L., Wolfers, P., Zach, R.

“…Neutron diffraction and magnetisation experiments have been performed on powdered Fe2P. The electronic band structure of Fe2P and the previously measured…”
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Critical behavior near the ferromagnetic to paramagnetic phase transition temperature in polycrystalline La0.7Ca0.2Sr0.1Mn1−Cr O3 (x= 0.15 and 0.2) by Dhahri, Ah, Jemmali, M., Hussein, M., Dhahri, E., Koumina, A., Hlil, E.K.

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Critical behavior near the ferromagnetic to paramagnetic phase transition temperature in polycrystalline La0.7Ca0.2Sr0.1Mn1―xCrxO3 (x = 0.15 and 0.2) by DHAHRI, Ah, JEMMALI, M, HUSSEIN, M, DHAHRI, E, KOUMINA, A, HLIL, E. K

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Crystal structure, vibrational and optical properties of a new self-organized material containing iodide anions of bismuth(III), [C sub(6H) sub(4)(NH sub(3)) sub(2)] sub(2Bi) sub(2)I sub(10) super(.)4H sub( 2O) by Hrizi, C, Samet, A, Abid, Y, Chaabouni, S, Fliyou, M, Koumina, A

“…Bismuth-iodide type zero-dimensional (0-D) organic/inorganic hybrid compound [C sub(6H) sub(4)(NH sub(3)) sub(2)] sub(2Bi) sub(2)I sub(10) super(.)4H sub( 2O…”
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Crystal structure, vibrational and optical properties of a new self-organized material containing iodide anions of bismuth(III), [C 6H 4(NH 3) 2] 2Bi 2I 10·4H 2O by Hrizi, C., Samet, A., Abid, Y., Chaabouni, S., Fliyou, M., Koumina, A.

“…► [C 6H 4(NH 3) 2] 2Bi 2I 10·4H 2O is a zero-dimensional (0-D) organic/inorganic hybrid compound. ► The crystal packing is governed by I⋯ I electrostatic…”
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Magneto-Structural Studies of 2-(2-Ammoniumethyl)-1-mACOthyl Pyrrolidinium Tetrachlorocuprate (II) by Amamou, W, Triki, M, Dhahri, E, Zouari, F, Koumina, A, Fliyou, M

“…The (C7H18N2)CuCl4 compound crystallized in the orthorhombic system with space group P 212121 and the following unit cell are: a=7.353(3), b=11.608(5),…”
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Magnetism of Fe sub(2)P investigated by neutron experiments and band structure calculations by Tobola, J, Bacmann, M, Fruchart, D, Kaprzyk, S, Koumina, A, Niziol, S, Soubeyroux, J-L, Wolfers, P, Zach, R

“…Neutron diffraction and magnetization experiments have been performed on powdered Fe sub(2)P. The electronic band structure of Fe sub(2)P and the previously…”
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Structure and magnetism in the polymorphous MnFeAs by Tobola, Janusz, Bacmann, Madeleine, Fruchart, Daniel, Wolfers, Pierre, Kaprzyk, Stanislaw, Koumina, Abdel-Azziz

“…Two crystallographic phases of MnFeAs were stabilised: the tetragonal Fe 2As-type structure or the hexagonal Fe 2P-type one, if synthesis is performed under…”
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