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Name: Dr. Ghulam Hassnain Jaffari.
Designation: Assistant Professor
Department: Physics


Qualifications:


Phone: +92-51 9064-2010
Email: g_hassnain@yahoo.com
Status: On job
Other Weblink:


Research Interests Publications Conferences Research Projects

Nanophysics and its applications.

Surface magnetism in core/shell, solid and hollow nanoparticles.

Complex Oxides and other correlated electron systems.

Lower dimensional magnetism (thin films and nanoparticles).

Ferroelectric and multiferroic systems.

Heusler Alloys.

Defect induced magnetism in Oxides.

 

[1]          G.H. Jaffari, A. Samad, A.M. Iqbal, S. Hussain, A. Mumtaz, M.S. Awan, M. Siddique, S.I. Shah, Effect of A and B-site substitution with Pb, La and Ti on phase stabilization and multiferroic properties of BiFeO3, Journal of Alloys and Compounds 644(2015) 893-899.

[2]          G.H. Jaffari, A.K. Rumaiz, C. Ni, E. Yassitepe, M. Bah, S.I. Shah, Observation of metastable phase separation and amorphous phase in Fe67Co33 alloy thin films synthesized by pulsed laser depositions, Current Applied Physics 15(2015) 717-721.

[3]          G.H. Jaffari, M.A. Iqbal, S.K. Hasanain, A. Ali, A.S. Bhatti, S.I. Shah, A. Mumtaz, Effect of densification on the ferroelectric response of Ba0.4Sr0.6TiO3, Solid State Communications 205(2015) 46-50.

[4]          S. Hussain, S.K. Hasanain, G.H. Jaffari, S.I. Shah, Thickness dependent magnetic and ferroelectric properties of LaNiO3 buffered BiFeO3 thin films, Current Applied Physics 15(2015) 194-200.

[5]          S. Hussain, S.K. Hasanain, G.H. Jaffari, N.Z. Ali, M. Siddique, S.I. Shah, Correlation between structure, oxygen content and the multiferroic properties of Sr doped BiFeO3, Journal of Alloys and Compounds 622(2015) 8-16.

[6]          G.H. Jaffari, Z. Mehmood, A.M. Iqbal, S.K. Hasanain, S.I. Shah, Development of ferroelectric correlations in the quantum paraelectric and antiferrodistortive regimes in BaxSr1-xTiO3 (x <= 0.10), Journal of Applied Physics 116(2014).

[7]          A.M. Iqbal, G.H. Jaffari, S.K. Hasanain, Dynamic Response in Ba1-xSrxTiO3 and Anomalous Behavior at the Phase Boundary Composition, Journal of the American Ceramic Society 97(2014) 3177-3183.

[8]          S.U. Awan, S.K. Hasanain, G.H. Jaffari, Z. Mehmood, Carrier concentration dependence of ferroelectric transition in multiferroic Li doped and Li-Co co-doped ZnO nanoparticles, Applied Physics Letters 104(2014).

[9]          S.U. Awan, S.K. Hasanain, G.H. Jaffari, D.H. Anjum, U.S. Qurashi, Defects induced luminescence and tuning of bandgap energy narrowing in ZnO nanoparticles doped with Li ions, Journal of Applied Physics 116(2014).

[10]        G.H. Jaffari, H. Lin, A.K. Rumaiz, E. Yassitepe, C. Ni, S.I. Shah, Comparative surface studies of oxygen passivated FeCo nanoparticles and thin films, Physica Status Solidi a-Applications and Materials Science 210(2013) 306-310.

[11]        S. Hussain, S.K. Hasanain, G.H. Jaffari, S. Faridi, F. Rehman, T.A. Abbas, S.I. Shah, Size and Lone Pair Effects on the Multiferroic Properties of Bi(0.75)A(0.25)FeO(3-delta) (A = Sr, Pb, and Ba) Ceramics, Journal of the American Ceramic Society 96(2013) 3141-3148.

[12]        M.M. Can, G.H. Jaffari, S. Aksoy, S.I. Shah, T. Firat, Synthesis and characterization of ZnGa2O4 particles prepared by solid state reaction, Journal of Alloys and Compounds 549(2013) 303-307.

[13]        S.U. Awan, S.K. Hasanain, M.F. Bertino, G.H. Jaffari, Effects of substitutional Li on the ferromagnetic response of Li co-doped ZnO:Co nanoparticles, Journal of Physics-Condensed Matter 25(2013).

[14]        M. Aftab, G.H. Jaffari, S.K. Hasanain, T.A. Abbas, S.I. Shah, Magnetic and transport properties of Co2Mn1-xCrxSi Heusler alloy thin films, Journal of Applied Physics 114(2013).

[15]        A.K. Rumaiz, J.C. Woicik, C. Weiland, Q. Xie, D.P. Siddons, G.H. Jaffari, C. Detavernier, Band alignment in Ge/GeOx/HfO2/TiO2 heterojunctions as measured by hard x-ray photoelectron spectroscopy, Applied Physics Letters 101(2012).

[16]        G.H. Jaffari, A.K. Rumaiz, J.C. Woicik, S.I. Shah, Influence of oxygen vacancies on the electronic structure and magnetic properties of NiFe2O4 thin films, Journal of Applied Physics 111(2012).

[17]        G.H. Jaffari, T. Ekiert, K.M. Unruh, S.I. Shah, Effect of particle size distribution on the magnetic properties gamma-Fe2O3 nanoparticles, Materials Science and Engineering B-Advanced Functional Solid-State Materials 177(2012) 935-941.

[18]        G.H. Jaffari, A. Ceylan, H.P. Bui, T.P. Beebe, Jr., S. Ozcan, S.I. Shah, Non-equilibrium cation distribution and enhanced spin disorder in hollow CoFe2O4 nanoparticles, Journal of Physics-Condensed Matter 24(2012).

[19]        S.U. Awan, S.K. Hasanain, M.F. Bertino, G.H. Jaffari, Ferromagnetism in Li doped ZnO nanoparticles: The role of interstitial Li, Journal of Applied Physics 112(2012).

[20]        M. Aftab, G.H. Jaffari, S.K. Hasanain, T.A. Abbas, S.I. Shah, Disorder and weak localization effects in Co2MnxTi1-xAl Heusler alloy thin films, Journal of Physics D-Applied Physics 45(2012).

[21]        M. Aftab, G.H. Jaffari, S.K. Hasanain, S.I. Shah, Structural and magnetic properties of quaternary Co(2)Mn(1-x)Cr(x)Si Heusler alloy thin films, Journal of Applied Physics 110(2011).

[22]        E. Yassitepe, Z. Khalifa, G.H. Jaffari, C.-S. Chou, S. Zulfiqar, M.I. Sarwar, S.I. Shah, A new route for the synthesis of CuIn0.5Ga0.5Se2 powder for solar cell applications, Powder Technology 201(2010) 27-31.

[23]        N. Sharma, G.H. Jaffari, S.I. Shah, D.J. Pochan, Orientation-dependent magnetic behavior in aligned nanoparticle arrays constructed by coaxial electrospinning, Nanotechnology 21(2010).

[24]        A.K. Rumaiz, J.C. Woicik, W.G. Wang, J. Jordan-Sweet, G.H. Jaffari, C. Ni, J.Q. Xiao, C.L. Chien, Effects of annealing on the local structure of Fe and Co in CoFeB/MgO/CoFeB tunnel junctions: An extended x-ray-absorption fine structure study, Applied Physics Letters 96(2010).

[25]        G.H. Jaffari, A. Ceylan, C. Ni, S.I. Shah, Enhancement of surface spin disorder in hollow NiFe2O4 nanoparticles, Journal of Applied Physics 107(2010).

[26]        G.H. Jaffari, S.R. Ali, S.K. Hasanain, G. Guentherodt, S.I. Shah, Stabilization of surface spin glass behavior in core-shell Fe67Co33-CoFe2O4 nanoparticles, Journal of Applied Physics 108(2010).

[27]        M. Coskun, M. Korkmaz, T. Firat, G.H. Jaffari, S.I. Shah, Synthesis of SiO2 coated NiFe2O4 nanoparticles and the effect of SiO2 shell thickness on the magnetic properties, Journal of Applied Physics 107(2010).

[28]        M. Coskun, G.H. Jaffari, S. Manzoor, M. Korkmaz, S.I. Shah, Synthesis and magnetic properties of Co-Cr2O3 nanocomposites, Journal of Magnetism and Magnetic Materials 322(2010) 1731-1735.

[29]        S. Anjum, G.H. Jaffari, A.K. Rumaiz, M.S. Rafique, S.I. Shah, Role of vacancies in transport and magnetic properties of nickel ferrite thin films, Journal of Physics D-Applied Physics 43(2010).

[30]        A.K. Rumaiz, J.C. Woicik, E. Cockayne, H.Y. Lin, G.H. Jaffari, S.I. Shah, Oxygen vacancies in N doped anatase TiO2: Experiment and first-principles calculations, Applied Physics Letters 95(2009).

[31]        G.H. Jaffari, H.-Y. Lin, C. Ni, S.I. Shah, Physiochemical phase transformations in Co/CoO nanoparticles prepared by inert gas Condensation, Materials Science and Engineering B-Advanced Functional Solid-State Materials 164(2009) 23-29.

[32]        A. Aslam, S.K. Hasanain, G.H. Jaffari, M. Asim, S. Ali, P. Granitzer, H. Krenn, P. Knoll, W. Lang, Phase separation and stability in Sm(0.50)Sr(0.50)MnO(3): effects of cation dopants, Journal of Physics-Condensed Matter 20(2008).

 

  1. Poster  presentation “Effects of Cation dopant sizes on the magnetic and conducting phases of Sm0.55Sr0.45MnO3 ”, G. Hassnain Jaffari, A. Aslam, and S. K. Hasanain, International Conference organized by Pakistan Institute of Physics, March 13th-16th 2006, held at Physics Department University of Engineering & Technology, Lahore.
  2. Poster presentation “Synthesis of hollow NiFe2O4 nanoparticles based on Kirkendal effect and chemical transformation; Enhanced surface spin disorder”. G. Hassnain Jaffari, A. Ceylan, C. Ni, S. Ismat Shah, 11th Joint MMM-Intermag, January 18-22, 2010, Washington DC, USA.
  3. Poster presentation “Role of cationic/oxygen vacancies in transport and magnetic properties of NiFe2 O4 thinfilms prepared by pulsed laser deposition” G. Hassnain Jaffari, Abdul K. Rumaiz and S. Ismat Shah, Applied Physics Society, March Meeting March 15–19, 2010; Portland, Oregon, USA.
  4. Oral presentation “Enhancement of surface spin disorder in hollow NiFe2O4 nanoparticles, G. Hassnain Jaffari, A. Ceylan, C. Ni, S. IsmatShah , Applied Physics Society, March Meeting, March 15–19, 2010; Portland, Oregon, USA
  5. Oral presentation “Stabilization of surface spin glass behavior in core/shell-Fe67 Co33 /CoFe2 O4 nanoparticles” G. Hassnain Jaffari, S. Rizwan Ali, S. K. Hasanain, Gernot Güntherodt and S. Ismat Shah,  Applied Physics Society, March Meeting, March 21-25, 2011; Dallas, Texas, USA.
  6. Oral presentation, “Electronic structure and magnetic properties of stoichiometric and non-stoichiometric NiFe2 O4 G. Hassnain Jaffari, A. K. Rumaiz, J.C. Woicik, S. Ismat Shah, 56th Annual Conference on Magnetism & Magnetic Materials, Oct 30 – Nov 3, 2011, Scottsdale, Arizona, USA.


Quaid-i-Azam University Islamabad, 45320, Pakistan.
Tel: +92-51 9064 0000, Email:webmaster@qau.edu.pk