American Journal of Materials Science

American Journal of Materials Science publishes reviews, full-length papers, and short communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials.

Emad Girgis

Editorial Board Member of American Journal of Materials Science

Professor, National Research Centre, Egypt

Research Areas

Advanced Materials and Nanotechnology, Spintornics and Nanomagnetism, Clean Energy and Biosensors

Education

2000DoctorApplied Physics, Bochum University, Germany
1997DiplomaPhysics, Bochum University, Bochum, Germany
1993M.ScPhysics, Helwan University, Helwan, Cairo, Egypt
1988B.ScPhysics, Helwan University, Helwan, Cairo, Egypt

Experience

2009-presentAssociate Professor, Advanced Materials and Nanotechnology Lab, Center of Excellence for Advanced Sciences (CEAS) & Solid State Physics Department, National Research Centre, Cairo, Egypt
2007-2008Postdoctoral Research Associate, Nanomagnetism and Spintronics Group, Department of Physics and Astronomy, University of Victoria, BC, Canada
2005-2006Research Assistant Professor, Advanced Materials and Nanotechnology Lab. Solid State Physics Department, National Research Centre, Cairo, Egypt
2003-2004Research Fellow, Spintronics and Nano-Structures Group, Faculty of Physics, Wuerzburg University, Wuerzburg, Germany
2002Research Fellow, Scanning Probe Microscopy (SPM) Group, Physics department, Faculty of Science, Katholike University, Leuven, Belgium
2001Researcher, Solid State Physics Department, National Research Centre
1996-2000Postgraduate student, Institute of Bio-and Nanosystems, Forschungszentrum Juelich, Germany
1992-1995Research Assistant, Solid State Physics Department, National Research Centre, Cairo, Egypt

Academic Achievement

Fulbright award (6 months scholarship), Faculty of Engineering, Harvard University, USA, 2011-012
Prof. Shehata Farag award, applied Physics, National Research Centre, Cairo, 2011
The best patent award presented at INVOTEC Cairo, Egypt, 17-18 October 2010
National Research Centre award for scientific encouragement in Applied Physics, 2005
Scientific and Technological Ingeniousness award in electrical Engineering and its Applications, Shrouk Academy, Egypt, 2005

Membership

Member of Canadian Association of Physicist
Member of Materials Research Society
Member of Fulbright Science Circle, Cairo, Egypt
Member of Egyptian Society of Advanced Materials and Nanotechnology
Member of Egyptian Society of Materials Science

Publications: Journals

[1]  "Magnetization process in vortex-imprinted Ni80Fe20/Ir20Mn80 square elements", H. Xu, J. Kolthammer, J. Roude, E.Girgis, B.C. Choi, Y.K.Hong, G. Abo, D.Niarchos, J. of Magn. 16 , 2, (2011).
[2]  "Synthesis, Magnetic and Optical properties of core/shell Co1-xZnxFe2O4/SiO2 nanoparticles", E. Girgis, M. M.S. Wahsh, A. G.M. Othman, L.Bandhu and k.V. Rao, Nanoscale Res. Let. 6, 460, (2011).
[3]  "Genotoxicity evaluation of nanomaterials: DNA damage and micronuclei induced by quantum dots in liver and bone marrow cells of male mice in vivo", W. Khalil, E. Girgis, M. Baker and A. Emam and K.V.Rao, Chem. Res. Toxicol., 24, 640 (2011).
[4]  "Ultraviolet Light sensitive indium-doped ZnO thin film field effect transistor printed by inkjet technique", Yan Wu, Emad Girgis, Valter Ström, Wolfgang Voit, Lyubov Belova and K.V.Rao, 1-4, 1002 Phys. Stat. Sol. A (2010)
[5]  "Incoherent interaction of propagating spin waves with precessing magnetic moments", B. C. Choi, E. Girgis, C. A. Ross, Th. Speliotis3 Y. K. Hong, G. S. Abo, D. Niarchos, and H. Miyagawa, Phys. Rev. B, 81, 092404 (2010)
[6]  "Influence of the Size and Shape of the magnetic nanodots on the magnetization reversal for Ultra high density data storage devices", E. Girgis and S. P. Pogossian, Accepted for publication at The Transaction of the Egyptian Society of Chemical Engineers (TESCE) (2009).
[7]  "Interaction in soft magnetic bilayers nanoscale arrays", , J.E. Davies, L.H. Bennet, E.Della Torre, B.C. Choi, S.N. Piramanayagam, and E. Girgis, IEEE Trans. Magn.44, 11, Nov. (2008).
[8]  "Spin Flip Scattering Effect on Current-in-Plane Spin-Valve", A. Jalil, M. J. Ma, S. G. Tan, E. Girgis and G. C. Han, J. Appl. Phys., 103, 07A712 (2008).
[9]  "Spin current pulse induced switching of vortex chiralities in permalloy/Cu/Co nanopillars", B.C. Choi, J. Rudge, E.Girgis, J. Kolthammer, Y.K. Hong, and A. Lyle, Appl. Phys. Lett, 91, 022501(2007). (This article has been selected for the July 23, 2007 issue of Virtual Journal of Nanoscale Science & Technology).
[10]  "Dynamics of magnetic vortex core switching in Fe nanodisks by applying an in-plane magnetic field pulse", Q.F. Xiao, J. Rudge, E. Girgis, and J. Kolthammer, B.C. Choi, Y.K. Hong and G.W. Donohoe. J. Appl. Phys. 102, 103904 (2007). (This article has been selected for the December 3, 2007 issue of Virtual Journal of Nanoscale Science & Technology.).
[11]  "Nonequilibrium process of magnetization switching influenced by thermal spin fluctuations", B.C. Choi, Y.K. Hong, J. Rudge, E. Girgis, Q.F. Xiao, J. Kolthammer, and G.W. Donohoe, Phys. Stat. Sol. (b), 244 (12), 4486 (2007).
[12]  "Characterization of magnetization vortex state in magnetic tunnel junctions patterned into nanometer scale arrays", E. Girgis, S. P. Pogassian and M. Gbordzoe, J. Appl. Phys., 99, 014307(2006).
[13]  "Effects of surface topography on magnetization reversal of magnetic thin films", E. Girgis, S. P. Pogassian and M. L. Benkhedar, J. nanoscience and nanotechnology, 6, 1 (2006).
[14]  "Tunnelling magnetoresistance in devices based on epitaxial NiMnSb with uniaxial anisotropy", J. Liu, E. Girgis, P. Bach, C. Ruster, C. Gould, G. Schmidt and L. W. Molenkamp, J. Appl. Phys., 99, 03611(2006).
[15]  "Fabrication of metallic nano-air bridges using multiply-dose electron beam lithography", E. Girgis, J. Liu and M. L. Benkhedar, Appl. Phys. Lett, 88, 202103 (2006).
[16]  "Size and shape dependencies of magnetization reversal in nanoscale Exchange biased Ferromagnetic/Antiferromagnetic dot arrays", E. Girgis, R. D. Protugal, K. Temst, and C. Van Haesendonck, J. Phys. D: App. Phys 39, 1733 (2006).
[17]  "Effects of ZnO-doping on structural and magnetic properties of CdFe2O4", A. Mostafa, G. Elshobaky and E. Girgis, J. Phys. D: App. Phys, 39, 2007 (2006).
[18]  "Nickel and Iron nanoparticles in natural rubber composites", E. El-Nashar, S. H. Mansour and E. Girgis, J. Mat. Sci, 41, 5359 (2006).
[19]  "Giant Magnetoresistance in an epitaxial NiMnSb/Cu/CoFe multilayer", E. Girgis, P. Bach, C. Ruester, C. Gould, G. Schmidt and L.W. Molenkamp, Appl. Phys. Lett. 86, 142503, (2005).
[20]  "Tunnelling Anisotropic Magnetoresistance: Creating a Spin-Vale like Signal using a Single Ferromagnetic Semiconductor layer", C. Ruster, C. Gould, T. Jungwirth, E. Girgis, G. M. Schott, R. Giraud, K. Brunner, G. Schmidt and L.W. Molenkamp, J. Appl. Phys. 97, 10C506 (2005).
[21]  "Asymmetric Magnetization Reversal in Exchange-biased NiFe/CoO submicron-sized structures", E. Girgis, R. D. Portugal, M.J. Van Bael, K. Temst and C. Van Haesendonck, J. Appl. Phys. 97, 103911(2005).
[22]  "Magnetization and polarized neutron reflectivity experiments on patterned exchange Bias Structures", K. Temst, E. Girgis, R. D. Portugal, H. Loosvelt, E. Popva, M. J. Van Bael, C. Van Haesendonck, H. Frizsche, M. Gierlings, L. H. A. Leunissen, and R. Jonckheere, Eur. Phys. J. B, 00074, (2005).
[23]  "Spin-valve-like behavior of the tunneling magnetoresistance in a junction between (Ga, Mn)As and a non magnetic metal", C. Gould, C. Ruester, T. Jungwirth, E. Girgis, G. Schott, R. Griaud, K. Bruner, G. Schmidt and L.W. Molenkamp, Phys. Rev. Lett. 93, 117203 (2004), and cond-Mat/0407735 v1 28 (2004).
[24]  "Enhanced Asymmetric Magnetization Reversal in Nanoscale Co/CoO Arrays: Competition between Exchange Bias and Magnetostatic Coupling", E. Girgis, R.D. Portugal, H. Loosvelt, M.J. Van Bael, M. Malfait, K. Temst, C. Van Haesendonck, L.H.A. Leunissen and R. Jonckheere. Phys. Rev. Lett. 91, 187202 (2003). (This article has been selected for the November 10, 2003 issue of Virtual Journal of Nanoscale Science & Technology.)
[25]  "Tunnel magnetoresistance devices processed by oxidation in air and UV assisted oxidation in Oxygen", E. Girgis, J. Schelten, P. Gruenberg, P. Rottlaender, and H. Kohlstedt, IEEE Trans. Electron Devices 47, 697 (2000).
[26]  "Dielectric breakdown of lithography patterned tunnel junctions prepared by UV oxidation method", E. Girgis, H. Boeve, J. De Boeck, J. Schelten, P. Rottlaender, H. Kohlstedt, and P. Gruenberg J. Magn. Magn. Mat. 222, 1333 (2000).
[27]  "Switching characteristics and magnetization vortices of thin-film cobalt in nanometerscale patterned arrays", E. Girgis, J. Schelten, J. Shi, J. Janesky, S. Tehrani, and H. Goronkin Appl. Phys. Lett. 76, 3780 (2000).
[28]  "Ultraviolet light assisted oxidation for magnetic tunnel junctions", P. Rottlaender, H. Kohlstedt, P. Gruenberg, and E. Girgis J. Appl. Phys. 87, 6067 (2000).
[29]  "Strongly reduced bias dependence in spin-tunnel junctions obtained by ultraviolet light assisted oxidation", H. Boeve, E. Girgis, J.Scelten, J. De Boeck, and G.Borghs, Appl. Phys. Lett. 76, 1048 (2000).
[30]  "Magnetic tunnel junctions prepared by ultraviolet light assisted oxidation", P. Rottlaender, H. De Geronkel, H. Kohlstedt, E. Girgis, J. Schelten, and P. Gruenberg, J. Magn. Magn. Mat. 210, 215 (2000).
[31]  "Evaluation of the in-situ UV oxidation techniques for tunnel-junction preparation", E. Girgis, H.Boeve, J. De Boeck, J.Schelten, G. Borghs, Digests of the intermag conference, Ds, 06, (2000).