الابحاث : |
1-M.M. Ahmad, L. Alismail, A. Alshoaibi, A. Aljaafari, H. Mahfoz Kotb, R. Hassanien, Dielectric behavior of spark plasma sintered BaTi0.7Zr0.3O3 relaxor ferroelectrics, Results in Physics, Elsevier Ltd., 15 , 102799, https://doi.org/10.1016/j.rinp.2019.102799, 2019
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2-Mohamad M. Ahmad, Lithium ionic conduction and relaxation dynamics of spark plasma sintered Li5La3Ta2O12 garnet nanoceramics, Nanoscale Research Letters, Springer, 10, 58: 1-10, 2015
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3-Mohamad M. Ahmad, Estimation of the concentration and mobility of mobile Li+ ions in the cubic garnet-type Li7La3Zr2O12, RSC Advances, Royal Society of Chemistry, Vol. 5, 25824, 2015
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4-Mohamad M. Ahmad, One-Step Mechanochemical synthesis and Enhanced Ionic Conductivity of AgI-Al2O3 composite materials, Zeitschrift fuer Naturforschung A , De Gruyter, Vol. 70, 17, 2015
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5-Mohamad M. Ahmad, Enhanced lithium ionic conductivity and study of the relaxation and giant dielectric properties of spark plasma sintered Li5La3Nb2O12 nanomaterials, Ceramics International, Elsevier, Vol. 41, 6398, 2015
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6-Mohamad M. Ahmad, Giant dielectric properties of nanocrystalline Pb1-xSnxF2 solid solutions, Journal of Materials Science: Materials in Electronics, Vol. 25, 4398, 2014
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7-Mohamad M. Ahmad, Koji Yamada, Grain size effect on the giant dielectric constant of CaCu3Ti4O12 nanoceramics prepared by mechanosynthesis and spark plasma sintering, Journal of Applied Physics, Vol. 115, 154103, 2014
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8-M.M. Ahmad, E. Al-Libidi, A. Al-Jaafari, S. Ghazanfar and K. Yamada, Mechanochemical synthesis and giant dielectric properties of CaCu3Ti4O12, Applied Physics A, Vol. 116, 1299, 2014
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9-Mohamad M. Ahmad, Giant dielectric constant in CaCu3Ti4O12 nanoceramics, Applied Physics Letters, Vol. 102, 232908, 2013
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10-M.M. Ahmad*, Y. Yamane, and K. Yamada, The ionic conductivity and dielectric properties of Ba1-xSnxF2 solid solutions prepared by mechanochemical milling, Materials Science and Engineering B , Vol. 178, 965, 2013
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11-M.M. Ahmad*, Y. Yamane, and K. Yamada, Structure, ionic conduction, and giant dielectric properties of mechanochemically synthesized BaSnF4, Journal of Applied Physics, Vol. 106, 074106 , 2009
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12-Mohamad M. Ahmad, Koji Yamada, Hopping rates and concentration of mobile fluoride ions in Pb1-xSnxF2 solid solutions, The Journal of Chemical Physical, Vol. 127, 124507, 2007
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13-M.M. Ahmad*, Y. Yamane, K. Yamada, S. Tanaka, Dielectric relaxation properties of Pb1-xSnxF2 solid solutions prepared by mechanochemical milling, Journal of Physics D: Applied Physics, Vol. 40, 6020, 2007
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14-Mohamad M. Ahmad, Koji Yamada, Superionic PbSnF4: A giant dielectric constant material, Applied Physics Letters, Vol. 91, 052912, 2007
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15-M.A. Gaffar*, M.M. Ahmad, K. Yamada and T. Okuda, The double-peak phenomenon of the phase transition of Rb substituting K in LiKSO4, competition between Rb sub-lattice and smearing the phase transition, Journal of Physics D: Applied Physics, Vol. 40, 4360, 2007
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16-M.M. Ahmad*, K. Yamada, P. Meuffels and R. Waser, Aging-induced dielectric relaxation in barium titanate ceramics, Applied Physics Letters, Vol. 90, 112902, 2007
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17-M.M. Ahmad*, M.A. Gaffar, K. Yamada and T. Okuda, Ion dynamics and structure-dependent conductivity scaling properties in polycrystalline LiK1-xRbxSO4, Journal of Physics and Chemistry of Solids, Vol. 68, 470, 2007
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18-J.R. Macdonald and M.M. Ahmad, Slopes, nearly constant loss, universality, and hopping rates for dispersive ionic conduction, Journal of Physics: Condensed Matter, Vol. 19, 046215, 2007
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19-M.M. Ahmad, S.A. Makhlouf, K.M.S.Khalil, Dielectric behavior and ac conductivity study of NiO/Al2O3 nanocomposites in humid atmosphere
, J. Appl. Phys. , American Institute of Physics (AIP), 100, 094323, http://jap.aip.org/, 2006
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20-M.M. Ahmad, S.A. Makhlouf and K.M.S. Khalil, Dielectric behavior and ac conductivity of NiO/Al2O3 nanocomposites in humid atmosphere, Journal of Applied Physics, Vol. 100, 094323, 2006
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21-Mohamad M. Ahmad, Ionic conduction and dielectric relaxation in polycrystalline Na2SO4, Solid State Ionics, Vol. 177, 21, 2006
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22-M.M. Ahmad, E. Yousef and E. Mostfa, Dielectric properties of the ternary TeO2-Nb2O5-ZnO glasses, Physica B, Vol. 371, 74, 2006
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23-Mohamad M. Ahmad, Estimation of the charge-carrier concentration and ac-conductivity scaling properties near the V-I phase transition of polycrystalline Na2SO4, Physical Review B, Vol. 72, 174303, 2005
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24-Mohamad M. Ahmad, Ionic conduction and relaxation in some superionic fluoride ion conductors, Defect and Diffusion Forum, Vol. 229, 1, 2004
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25-K. Yamada, M.M. Ahmad, Y. Ogiso, T. Okuda, J. Chikami, G. Miehe, H. Ehrenberg and H. Fuess, Two dimensional fluoride ion conductor RbSn2F5 studied by impedance spectroscopy and 19F, 119Sn and 87Rb NMR, The European Physical Journal B, , Vol. 40, 167, 2004
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26-M.M. Ahmad, K. Yamada and T. Okuda, Conductivity spectra and comparative scaling studies of polycrystalline PbSnF4, Solid State Ionics, Vol. 167, 285, 2004
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27-K. Yamada, M.M. Ahmad, H. Ohki, T. Okuda, H. Ehrenberg and H. Fuess, Structural phase transition of the two-dimensional fluoride ion conductor KSn2F5 studied by X-ray diffraction, Solid State Ionics, Vol. 167, 301, 2004
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28-M.M. Ahmad, K. Yamada and T. Okuda, Ionic conduction and relaxation in KSn2F5 fluoride ion conductor, Physica B, Vol. 339, 94, 2003
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29-M.M. Ahmad, M.A. Hefni, A.H. Moharram, G.M. Shurit, K. Yamada and T. Okuda, , “Fluoride ion dynamics and relaxation in KSn2F5 studied by 19F NMR and impedance spectroscopy, Journal of Physics: Condensed Matter, Vol. 15, 5341, 2003
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30-M.M. Ahmad, K. Yamada and T. Okuda, Fluoride ion diffusion of superionic PbSnF4 studied by NMR and impedance spectroscopy, Journal of Physics: Condensed Matter, Vol. 14, 7233, 2002
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31-M.M. Ahmad, K. Yamada and T. Okuda
, Frequency dependent conductivity and dielectric studies on RbSn2F5, Solid State Communications, Vol. 123, 185, 2002
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32-M.M. Ahmad and M.A. Hefni, Effect of Li content on the DSC and electrical conductivity of (Li1-xKx)2SO4 mixed crystals, Zeitschrift fur Naturforschung A, Vol. 56, 677, 2001
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33-M.A. Osman, M.A. Hefni, R.M. Mahfouz and M.M. Ahmad, g-irradiation effect on the electrical properties of LiKSO4, Physica B, Vol. 301, 318, 2001
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34-M.M. Ahmad and M.A. Hefni, DSC and electrical conductivity studies of (Li1-xKx)2SO4 mixed crystals, Radiation Effects and Defects in Solids, Vol. 153, 359, 2001
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35-M.A. Hefni, M.A. Osman, R.M. Mahfouz and M.M. Ahmad, g-irradiation effect on the spectroscopic and electrical properties of K2SO4-Na2SO4 mixed system, Radiation Effects and Defects in Solids, Vol. 153, 151, 2001
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36-M.A. Osman, M.A. Hefni, R.M. Mahfouz and M.M. Ahmad, Spectroscopic studies and electrical conductivity behavior of g-irradiated Li2SO4-Na2SO4 mixed system, Radiation Effects and Defects in Solids, Vol. 153, 115, 2001
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37-M.A. Hefni, M.A. Osman, R.M. Mahfouz and M.M. Ahmad, Electron paramagnetic resonance, infrared, and electrical conductivity studies of -ray irradiated Li2SO4- K2SO4 mixed system, Radiation Effects and Defects in Solids, Vol. 152, 255, 2000
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38-M.A. Hefni, M.A. Osman, R.M. Mahfouz and M.M. Ahmad, Electron paramagnetic resonance studies of g-ray irradiated Li2SO4- K2SO4 mixed crystals, Arab Journal of Nuclear Sciences and Applications, Vol. 32, 190, 1999
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ش طريق الداخله– الخارجة الوادي الجديد
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