Zobrazeno 1 - 10
of 70
pro vyhledávání: '"S.S. Ata-Allah"'
Publikováno v:
Journal of Superconductivity and Novel Magnetism. 32:115-125
Zn/Ga/Gd-substituted NiFe2O4 was formed by solid state reaction and citrate methods. The influence of substitutions on phase formation, the strain, crystallize size, cations distribution and magnetic properties have been examined by X-ray diffraction
Publikováno v:
Journal of Magnetism and Magnetic Materials. 423:291-300
Nano-crystalline NiFe 2 O 4 was synthesized by citrate and sol–gel methods at different annealing temperatures and the results were compared with a bulk sample prepared by ceramic method. The effect of methods of preparation and different annealing
Publikováno v:
Physica B: Condensed Matter. 481:118-123
The parent NiFe2O4 and Zn/Ga substituted spinel ferrite powders have been prepared by solid state reaction technique. As a typical example, the Ni0.7Zn0.3Fe1.5Ga0.5O4 sample has been prepared by sol–gel auto combustion method with the nano-scale cr
Autor:
Samia S. Abouelkheir, J. Alonso, P. Álvarez-Alonso, João P. Araújo, S.S. Ata-Allah, José Manuel Barandiarán, J.A. Blanco, Zoe Boekelheide, V.A. Chernenko, Inês F. Cruz, Ahmed A. El-Gendy, L. Fernández Barquín, Cristina Freire, A. García-Arribas, Hanan A. Ghozlan, P. Gorría, Ravi L. Hadimani, Shane Harstad, Shivakumar Hunagund, Zainab A. Hussein, S.M. Ismail, David C. Jiles, Sh. Labib, P. Lázpita, Rajasekhar Madugundo, M.B. Mohamed, Harikrishnan S. Nair, Yan Ni, Clara Pereira, André M. Pereira, Neelam Venkata Rama Rao, Soraya A. Sabry, Daniel Salazar, Daniel Salazar-Jaramillo, J.L. Sánchez Llamazares, Ana María Schönhöbel, Navneet Soin, M. Yehia, Zhen Zhang
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b7666601c873bea2f75b2e0e6ead5f5
https://doi.org/10.1016/b978-0-12-813904-2.09994-0
https://doi.org/10.1016/b978-0-12-813904-2.09994-0
Publikováno v:
Physica B: Condensed Matter. 406:801-811
X-ray structure parameters of La0.7Ca0.3Mn0.96(InxAl(1−x))0.04O3 perovskite manganites determined from the Rietveld analysis of the orthorhombic unit cell, space group Pbnm, showed strong dependence on x. Resistivity (ρ) and ac magnetic susceptibi
Autor:
S.S. Ata-Allah, M. Yehia
Publikováno v:
Physica B: Condensed Matter. 404:2382-2388
Single-phase structure of CuFe2O4 and Cu1−xZnxGa0.3Fe1.7O4; with (0.0≤x≤0.5) are synthesized. Electrical conductivity measurements as a function of temperature are carried out in the frequency range (102–105 Hz) for the prepared samples. The
Autor:
M. Kaiser, S.S. Ata-Allah
Publikováno v:
Materials Research Bulletin. 44:1249-1255
The ferrite system Ni x Cu 0.8− x Zn 0.2 Fe 2 O 4 with 0.0 ≤ x ≤ 0.8 was synthesized. XRD measurement confirmed the presence of single-phase spinel structure. The area ratio of Fe 3+ at the tetrahedral A- and octahedral B-sites was deduced from
Autor:
S.S. Ata-Allah, M. Kaiser
Publikováno v:
Journal of Alloys and Compounds. 471:303-309
Effect of Cu substitution in the spinel ferrite Ni 1− x Cu x Al 0.6 Fe 1.4 O 4 (0.0 ≤ x ≤ 1.0) in steps of 0.25 has been studied. Electrical measurements in the frequency range 10 2 –10 5 Hz and at temperature between 300 and 600 K show that
Publikováno v:
Journal of Alloys and Compounds. 469:9-14
Single-phase spinel ferrite samples: CuFe 2 O 4 and Cu 1− x Zn x Ga 0.5 Fe 1.5 O 4 with (0.0 ≤ x ≤ 0.5) were synthesized. The dielectric permittivities ( ɛ ′ and ɛ ″) and dielectric loss tangent (tan δ ) were studied for the prepared sam
Publikováno v:
Journal of Magnetism and Magnetic Materials. 320:344-353
The (Al and In) doped La – Ca manganites La 0.7 Ca 0.3 Mn 0.96 (In x Al (1− x ) ) 0.04 O 3 with (0.0⩽ x ⩽1.0) were prepared. Structure investigation with X-ray diffraction demonstrates that the doped samples are single perovskite phase with o