Lowell Wenger Lowell E. Wenger

Dean, School of Natural Sciences & Mathematics

Professor, Department of Physics

 
Office: 464 Campbell Hall
Office phone: (205) 934-5102
Fax number: (205) 975-6111
E-mail: wenger@uab.edu
 Address:

    464 Campbell Hall

    1300 University Blvd.

    University of Alabama at Birmingham

    Birmingham, AL 35294-1170

Research Activity:
My research effort focuses on two areas of condensed matter physics: magnetic properties of solids and superconductivity. The magnetic studies focus on the fabrication and characterization of magnetic nanoparticles, nanowires and other nanostructures as well as bulk materials. In these studies, we utilize a variety of measurement techniques including SQUID magnetometry, vibrating sample magnetometry, ac susceptibility, heat capacity, and resistivity as well as structural characterization by X-ray diffraction and scanning electron microscopy. We are also interested in the development of these magnetic nanostructured materials and techniques for potential biomedical applciations. The superconductivity research focuses on understanding of the various physical phenomena, such as electrical, magnetic, and electrodynamic effects associated with both conventional metallic superconductors and high-temperature oxide superconductors, and the syntehsis of novel materials for increasing the superconducting transition temperature.

Recent Research Papers:

  • "Local Structure and Redox State of Copper in Tellurite Glasses", G.D. Khattak, A. Mekki, and L.E. Wenger, J. Non-Crystal. Solids 337, 174-181 (2004).

  • "Mesostructured Fe Oxide Synthesized by Ligand Assisted Templating with a Chelating Triol Surfactant", A. Lezau, M. Trudeau, G.M. Tsoi, L.E. Wenger, and D. Antonelli,  J. Phys. Chem. B 108, 5211-5216 (2004).

  • "Suppression of Charge-Ordering and Appearance of Magnetoresistance in a Spin-Cluster Glass Manganite La0.3Ca0.7Mn0.8Cr0.2O3", T. Sudyoadsuk, R. Suryanarayanan, P. Winotai, and L.E. Wenger, J. Magn. Magn. Mater. 278, 96-106 (2004).

  • "Magnetic Properties of Iron-Oxide and (Iron, Cobalt)-Oxide Nanoparticles Synthesized in Polystyrene Resin Matrix", R. Naik, E. Kroll, D. Rodak, G.M. Tsoi, E. McCullen, L.E. Wenger, R. Suryanarayanan, V.M. Naik, P.P. Vaishnava, Q. Tao, and P. Boolchand, J. Magn. Magn. Mater. 272-276, e1239-e1241 (2004).

  • "Optical and Electrical Properties of Low to Highly-Degenerate InN Films", D.B. Haddad, H. Dai, R. Naik, C. Morgan, V.M. Naik, J.S. Thakur, G.W. Auner, L.E. Wenger, H. Lu, and W.J. Schaff, Mat. Res. Symp. Proc. 798, Y12.7.1-6 (2004).

  • "Synthesis of MnP Nanocrystals by Treatment of Metal Carbonyl Complexes with Phosphines: A New, Versatile Route to Nanoscale Transition Metal Phosphides", S.C. Perera, G.M. Tsoi, L.E. Wenger, and S.L. Brock, J. Am. Chem. Soc. 125, 13960-13961 (2003).

  • "Application of De-silylation Strategies to the Preparation of Transition Metal Pnictide Nanocrystals: The Case of FeP", S.C. Perera, P.S. Fodor, G.M. Tsoi, L.E. Wenger, and S.L. Brock, Chem. Mater. 15, 4034-4038 (2003).

  • "Structure and Magnetic Properties of Lead Vanadate Glasses", A. Mekki, G.D. Khattak, P.S. Fodor, and L.E. Wenger, J. Non-Crystal. Solids 330, 156-167 (2003).

  • "Modeling of Hysteresis and Magnetization Curves for Hexagonally Ordered Electrodeposited Nanowires", P.S. Fodor, G.M. Tsoi, and L.E. Wenger, J. Appl. Phys. 93, 7438-7440 (2003).

  • "Zero Magnetization States in Electrodeposited Co0.45Fe0.55 Nanowire Arrays", P.S. Fodor, G.M. Tsoi, and L.E. Wenger, J. Appl. Phys. 93, 7035-7037 (2003).

  • "Structure and Magnetic Properties of Vanadium Silicate Glasses", A. Mekki, G.D. Khattak, D. Holland, M. Chinkhota, and L.E. Wenger, J. Non-Crystal. Solids 318, 193-201 (2003).

  • M.A. Salim, G.D. Khattak, N. Tabet, and L.E. Wenger, "X-ray Photoelectron Spectroscopy (XPS) Studies of Copper-Sodium Tellurite Glasses", J. Electron Spectroscopy & Related Phenomena 128, 75-83 (2003).

  • "Determination of Magnetic Exchange Stiffness and Surface Anisotropy Constants in Epitaxial Ni1-xCux(001) Films", P. Talagala, P. Fodor, D. Haddad, R. Naik, L.E. Wenger, P.P. Vaishnava, and V.M. Naik, Phys. Rev. B 66, 144426-6 (2002).

  • "Thermal Hysteresis In the Charge-Density-Wave Transition of Lu5Rh4Si10", C.S. Lue, F.H. Hsu, H.H. Li, H.D. Yang, Y.-K. Kuo, P.S. Fodor, and L.E. Wenger, Phys. Rev. B 66, 033101-4 (2002).

  • "Investigation of the Magnetic Properties in Strontium-Borate Vanadate Glasses", M. Chinkhota, P.S. Fodor, G.D. Khattak, and L.E. Wenger, J. Appl. Phys. 91, 8269-8271 (2002).

  • "Fabrication and Characterization of Co(1-x)Fex Alloy Nanowires", P.S. Fodor, G. Tsoi, and L.E. Wenger, J. Appl. Phys. 91, 8186-8188 (2002).

  • "Comparative Study of Stripe Magnetic Domains in Epitaxial Ni(111) and Co(0001) Films", R. Naik, S. Hameed, P. Talagala, R. Naik, V.M. Naik, and L.E. Wenger, J. Appl. Phys. 91, 7550-7552 (2002).

  • "A Study of Disordered Stripe Magnetic Domains Observed in Epitaxial Ni Films", S. Hameed, P. Talagala, R. Naik, L.E. Wenger, and V.M. Naik, J. Magn. Magn. Mater. 242-245, 1264-1266 (2002).

  • "X-ray Photoelectron Spectroscopy (XPS) and Magnetization Studies of Iron-Vanadium Phosphate Glasses", M.A. Salim, G.D. Khattak, Petru S. Fodor, and L.E. Wenger, J. Non-Crystal. Solids 289, 185-195 (2001).

  • "Analysis of Disordered Stripe Magnetic Domains in Strained Epitaxial Ni (001) Films", S. Hameed, P. Talagala, R. Naik, L.E. Wenger, V.M. Naik, and R. Proksch, Phys. Rev. B 64, 184406-6 (2001).

  • "Electron/Atom Transfer in Halo-Bridged Homobimetallic Complexes: Structure and Donor-Acceptor Properties of Face-to-Face Dicopper Complexes with Tetra-azamacrocyclic Ligands", Manawadevi Y. Udugala-Ganahenege, Mary Jane Heeg, Lew M. Hryhorczuk, L.E. Wenger, and John F. Endicott, Inorganic Chemistry 40, 1614-1625 (2001).

  • "Paramagnetic Meissner Effect In Nb Disks", Petru S. Fodor and L.E. Wenger, Physica C 341-348, 2043-2044 (2000).

  • "Investigation of the Paramagnetic Meissner Effect on Nb Disks", L.E. Wenger, L. Pust, and M.R. Koblischka,  Physica B 284-288, 797-798 (2000).

  • "Soft Magnetic Properties of Fe-(1% wt) Al Alloy Processed by Powder Metallurgy", Susil K. Putatunda, T. Nielsen , P. Talagala, R. Naik, and L.E. Wenger, Materials and Manufacturing Processes 15, 405-418 (2000).

  • "X-ray Photoelectron Spectroscopy (XPS) and Magnetization Studies of Copper-Vanadium Phosphate Glasses", G.D. Khattak, M.A. Salim, L.E. Wenger, and A.H. Gilani, J. Non-Crystal. Solids 262, 66-79 (2000).

Recent Theses:

  • Daniel J. Rodak, "In-Situ Preparation and Characterization of Magnetic Nanoparticles" (M.S.,2004)

  • Petru S. Fodor, "Study of Magnetic Nanostructures in Hexagonally Ordered Porous Alumina" (Ph.D.,2003)

  • Rick E. Soltis, "Investigations into the Theory and Applications of Oxygen Sensors Based on the Zirconia Electrochemical Cell" (Ph.D., 1999)

  • David J. Thompson, "Studies of the Paramagnetic Meissner Effect in Nb Disks" (Ph.D.,1996)

  • Jonathan Obien, "Synthesis and Characterization of YBaCuO Materials Exhibiting a Magnetic Anomaly at 336 K" (Ph.D.,1996)

  • David J. Kubinski, "Dependence of Giant Magnetoresistance on the Size and Composition of Ferromagnetic 3d-Metal Precipitates in an Ag Matrix" (Ph.D.,1995)

  • M.S.M. Minhaj, "Fabrication and Magnetic Characterization of Layered Superconductors" (Ph.D.,1994)

  • Kent J. Chang, "Electrodynamic Response of High Tc Oxide Thin Films to Microwave Radiation" (Ph.D.,1994).

  • John P. Hilburger, "Suppression of Diamagnetic Susceptibility in Various Shaped Superconductors" (M.A.,1992).

  • Laurence L. Henry, "Calorimetric and Magnetic Study of the Ho(Co1-xRhx)2 System in the 2 K to 95 K Temperature Range" (Ph.D.,1991).

  • Mir Wali, "Electrical and Magnetic Characterization of YBa2-xSrxCu3Ox and YBa2Cu3O7:Y2BaCuO5 Composites" (M.S.,1990).

  • Winston Win, "Investigation of the Microstructure in Copper-Oxide Superconductors by the ac Susceptibility Method" (Ph.D.,1990).

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