Wei Tang

Assistant Scientist II
Address
16 Wilhelm Hall
The Ames Laboratory
Ames, IA 50011-3020
Phone 515-294-8685
Email weitang@ameslab.gov

Research Interests

Study new/next generation magnetic materials including high energy magnets, nanocomposite magnets, and high temperature magnets using rapid solidification, inert gas atomization and liquid phase sintering techniques. Reveal and establish the relations of magnetic properties to alloy composition, microstructure and technical process based on Material Science, Physics and Metallurgical principles. Design and develop high performance magnets for energy-efficient or advanced electronic devices.

(Chronologically most recent on top)Publications with the Ames Laboratory

2007
Lian L X; Deng L J; Han M; Tang W; Feng S D . 2007. Microwave electromagnetic and absorption properties of Nd2Fe14B/alpha-Fe nanocomposites in the 0.5-18 and 26.5-40 GHz ranges. Journal of Applied Physics. 101:09M520. abstract
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Emrah Simsek

Assistant Scientist II
Address
235 Wilhelm Hall
The Ames Laboratory
Ames, IA 50011-3020
Phone 515-294-8916
Fax 515-294-4291
Email emrah@ameslab.gov

Research Interests

Investigation of solidification dynamics and solid-liquid interfacial phenomena, and materials characterization, as well as design and development of experimental techniques to study the rapid solidification behavior of metallic alloys of interest by means of containerless melting and solidification techniques such as electromagnetic levitation.


        Project Affiliations:

Deborah L. Schlagel

Assistant Scientist III
Address
111 Metals Development
The Ames Laboratory
Ames, IA 50011-3020
Phone 515-294-3924
Fax 515-294-8727
Email schlagel@iastate.edu

Research Interests

  • Synthesis of single crystals of Huesler alloys, magneto-responsive materials, superconductors, elements and alloys
  • Single crystal characterization and property analysis

        Project Affiliations:

(Chronologically most recent on top)Publications with the Ames Laboratory

2007
Richard M L; Feuchtwanger J; Allen S M; O'Handley R C; Lazpita P; Barandiaran J M; Gutierrez J; Ouladdiaf B; Mondelli C; Lograsso T; Schlagel D . 2007. Chemical order in off-stoichiometric Ni-Mn-Ga ferromagnetic shape-memory alloys studied with neutron diffraction. Philosophical Magazine. 87:3437-3447. abstract
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Trevor M. Riedemann

Assistant Scientist III
Address
122 Metals Development
The Ames Laboratory
Ames, IA 50011-3020
Phone 515-294-1366
Fax 515-294-8727
Email riedemann@ameslab.gov

Research Interests


        Project Affiliations:

(Chronologically most recent on top)Education

  • M.S. Metallurgy, Iowa State Univeristy, College of Engineering, 1996
  • B.S. Physics, Iowa State Univeristy, College of Liberal Arts and Sciences , 1992

(Chronologically most recent on top)Publications with the Ames Laboratory

2013
Tian L; Anderson I; Riedemann T; Russell A; Kim H . 2013. Prospects for novel deformation processed Al/Ca composite conductors for overhead high voltage direct current (HVDC) power transmission. Electric Power Systems Research. 105:105-114. abstract
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2012
Bao L H; He L; Meyer N; Kou X F; Zhang P; Chen Z G; Fedorov A V; Zou J; Riedemann T M; Lograsso T A; Wang K L; Tuttle G; Xiu F X . 2012. Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te. Scientific Reports. 2:726. abstract
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Tatiana Prozorov

Assistant Scientist III
Address
108 Spedding Hall
The Ames Laboratory
Ames, IA 50011-3020
Phone 515-294-3376
Email tprozoro@ameslab.gov

Research Interests

  • Templated synthesis of magnetic nanoparticles.
  • Shape and size-selective sonochemical synthesis of nanostructured materials (metals, metal oxides and carbides, alloys nanoparticles, colloids, quantum dots, polymers, ceramics, hollow nanospheres, carbon nanotubes; nanoparticles on various inorganic supports, nanocomposites).
  • Magnetic properties and feeding regimes of magnetotactic bacteria.
  • Synthesis and properties of magnetic fluids.
  • Effects of high-intensity ultrasound on structure and properties of novel materials.
  • Sonochemistry and sonoluminescence in ionic liquids.
  • Self-Assembled Monolayer coatings; materials design, modification of morphology and controllable agglomeration in granular materials, modification of polycrystalline superconductors.

        Project Affiliations:
        Bioinspired Materials

(Chronologically most recent on top)Education

  • Ph.D. Materials Chemistry, University of Illinois, Urbana-Champaign, 2004
  • M.Sc. Physical Chemistry, Bar-Ilan University, Ramat-Gan, Israel, 1998
  • M.Sc. Physical and Chemical Studies of Metallurgical Processes, Moscow Institute of Steel and Alloys, Moscow, Russia, 1992

(Chronologically most recent on top)Professional Appointments

  • 2007 - present Assistant Scientist II, US DOE Ames Laboratory
  • 2005 - 2007 Post-doctoral Research Associate, US DOE Ames Laboratory
  • 2004 - 2005 Post-doctoral Research Associate, University of South Carolina, Department of Chemical Engineering, Columbia, SC
  • 2004 - present Visiting Scholar, University of Illinois at Urbana-Champaign
  • 2002 - 2004 Research assistant, Superconductivity and Magnetism Low Temperature Laboratory University of South Carolina
  • 1999 - 2004 Graduate research assistant, University of Illinois at Urbana-Champaign
  • 1999 Visiting Scholar, University of Illinois at Urbana-Champaign
  • 1995 - 1998 Graduate research assistant, Bar-Ilan University, Ramat-Gan, Israel
  • 1991 - 1992 Graduate research assistant, Moscow Institute of Steel and Alloys, Moscow, Russia
  • 1989 - 1991 Undergraduate research assistant, Moscow Institute of Steel and Alloys, Moscow, Russia

(Chronologically most recent on top)Honors & Awards

  • 2007 Outstanding Mentor Award, SULI program (DOE)
  • 2006 Outstanding Mentor Award, SULI program (DOE)
  • 1995 - 1997 Milgat Eshcol – Fellowship of the Israeli Ministry of Science and Technology
  • 1990 - 1992 Academic Council Award for Excellence in Study and Research, Institute of Steel and Alloys, Moscow

(Chronologically most recent on top)Publications with the Ames Laboratory

2007
Prozorov T; Mallapragada S K; Narasimhan B; Wang L J; Palo P; Nilsen-Hamilton M; Williams T J; Bazylinski D A; Prozorov R; Canfield P C . 2007. Protein-mediated synthesis of uniform superparamagnetic magnetite nanocrystals. Advanced Functional Materials. 17:951-957. abstract
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Durga Paudyal

Assistant Scientist III
Address
252 Spedding Hall
The Ames Laboratory
Ames, IA 50011-3020
Phone 515-294-2041
Fax 515-294-9579
Email dpaudyal@iastate.edu

Research Interests

  • First principles electronic structure theory
  • Electronic, magnetic and magnetostructural properties of extraordinary responsive magnetic rare earth materials from first principles calculations
  • Finite temperature and field dependent magnetothermodynamic modeling of complex magnetic rare earth materials using outputs from first principles calculations
  • Phase stability analysis of rare earth based alloys and compounds

        Project Affiliations:

(Chronologically most recent on top)Education

  • Ph.D. Condensed Matter Physics, S.N. Bose National Centre for Basic Sciences (Jadavpur University), Kolkata, India, 2005
  • Post M. Sc. Physics, S.N. Bose National Centre for Basic Sciences, Kolkata, India, 2000
  • M. Sc. Physics, Tribhuvan University, Nepal, 1995

(Chronologically most recent on top)Professional Appointments

  • 2008 - present Assistant Scientist III, Ames Laboratory, US DOE, Iowa State University
  • 2004 - 2008 Post Doctoral Research Associate, Ames Laboratory, US DOE, Iowa State University
  • 1995 - 1999 Lecturer of Physics, Central Department of Physics, Tribhuvan University

(Chronologically most recent on top)Honors & Awards

  • 2011 Invited speaker: Invited for a invited talk at the Annual Meeting of the Minerals, Metals and Materials Society
  • 2010 Judge of Post Doctorate Research: Judging member for the best oral and poster presentations in the first Iowa State University Post Doctorate Research Day
  • 2010 Editor of Conference Proceeding: Thermag IV the 4th International Conference of IIR on Magnetic Refrigeration at Room Temperature
  • 2009 Conference Session Chair: Thermag III the 3rd International Conference of IIR on Magnetic Refrigeration at Room Temperature
  • 2009 Peer reviewing for conference proceeding: Thermag III, the 3rd International Conference of IIR on Magnetic Refrigeration at Room Temperature
  • Peer reviewing for book chapters: Handbook on the Physics and Chemistry of Rare Earths
  • Peer reviewing for scientific journals: Physical Review B, Applied Physics Letters, Journal of Applied Physics, Journal of Physics: Condensed Matter, Journal of Physics D: Applied Physics, Journal of Magnetism and Magnetic Materials, Journal of Alloys and Compounds, ACS (American Chemical Society) Nano

(Chronologically most recent on top)Publications with the Ames Laboratory

2008
Tarafder K; Rahaman M; Paudyal D; Sanyal B; Eriksson O; Mookerjee A . 2008. Study of phase stability in a class of binary alloys using augmented space recursion based orbital peeling technique. Physica B-Condensed Matter. 403:4111-4119. abstract
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Paudyal D; Mudryk Y; Lee Y B; Pecharsky V K; Gschneidner K A J; Harmon B N . 2008. Understanding the extraordinary magnetoelastic behavior in GdNi. Physical Review B. 78:184436. abstract
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2007
Paudyal D; Pecharsky V K; Gschneidner K A; Harmon B N . 2007. Magnetism of Gd5Ge4 from first principles. Physical Review B. 75:094427. abstract
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Yaroslav Mudryk

Assistant Scientist III
Address
239 Spedding Hall
The Ames Laboratory
Ames, IA 50011-3020
Phone 515-294-2728
Email slavkomk@ameslab.gov

Research Interests

  • “Extraordinary Responsive Rare Earth Materials” research area. The research activity is focused on the in situ structural characterization of R5(Si1 xGex)4 alloys using x-ray powder diffraction technique from 5 to 300 K and in magnetic fields from 0 to 4 T.
  • Works on extraordinary responsive intermetallic compounds (mainly R5T4, R = rare earth, T = Si, Ge, Sn, Sb), RCo2 intermetallic compounds and other materials containing rare-earth metals. In addition, provides assistance in the hourly work of students and post-docs; performs heat-capacity, magnetization, and x-ray measurements for scientists from around the world.

        Project Affiliations:

(Chronologically most recent on top)Education

  • Ph.D. Chemistry, Ivan Franko L'viv National University, Ukraine, 2002
  • B.S., M.S. Chemistry, Ivan Franko L'viv National University, Ukraine, 1997

(Chronologically most recent on top)Publications with the Ames Laboratory

2007
Pecharsky V K; Mudryk Y; Gschneldner K A . 2007. In-situ powder diffraction in high magnetic fields. Zeitschrift Fur Kristallographie. :139-145. abstract
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Wai Y. Leung

Assistant Scientist III
Address
213 Applied Science 1
Iowa State University
Ames, IA 50011
Phone 515-294-9794
Email wleung@iastate.edu

Research Interests


        Project Affiliations:
        Photonic Systems

(Chronologically most recent on top)Publications with the Ames Laboratory

2008
Lee J H; Leung W; Kim T G; Constant K; Ho K M . 2008. Polarized thermal radiation by layer-by-layer metallic emitters with sub-wavelength grating. Optics Express. 16:8742-8747. abstract
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Hu X H; Li M; Ye Z; Leung W Y; Ho K M; Lin S Y . 2008. Design of midinfrared photodetectors enhanced by resonant cavities with subwavelength metallic gratings. Applied Physics Letters. 93:241108. abstract
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2007
Lee J H; Leung W; Ahn J; Lee T; Park I S; Constant K; Ho K M . 2007. Layer-by-layer photonic crystal fabricated by low-temperature atomic layer deposition. Applied Physics Letters. 90:151101. abstract
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Yongbin Lee

Assistant Scientist III
Address
112 Wilhelm Hall
The Ames Laboratory
Ames, IA 50011-3020
Phone 515-294-9636
Email yblee@ameslab.gov

Research Interests

My research is focused on the theoretical investigation of electronic and magnetic properties of complex novel materials (mostly, but not limited, rare-earth compounds) through first principles methods.

  • X-ray magnetic circular dichroism & X-ray magnetic resonant scattering
  • Iron-Arsenic based superconductivity
  • Structure and magnetic phase transition
  • Shape memory and martensitic phase transition
  • Hard materials and elastic properties

        Project Affiliations:

(Chronologically most recent on top)Education

  • Ph.D. Physics, Iowa State University, 2004
  • M.S. Physics, Korea University, Korea, 1992
  • B.S. Physics, Korea University, Korea, 1989

(Chronologically most recent on top)Professional Appointments

  • 2008 - present Assistant Scientist, Ames Laboratory, US DOE, Iowa State University
  • 2004 - 2008 Postdoctoral Research Associate, Ames Laboratory, US DOE, Iowa State University

(Chronologically most recent on top)Publications with the Ames Laboratory

2008
Lee Y B; Caes B; Harmon B N . 2008. Role of oxygen 2p states for anti-ferromagnetic interfacial coupling and positive exchange bias of ferromagnetic LSMO/SRO bilayers. Journal of Alloys and Compounds. 450:1-6. abstract
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Tan L; Kreyssig A; Nandi S; Jia S; Lee Y B; Lang J C; Islam Z; Lograsso T A; Schlagel D L; Pecharsky V K; Gschneidner K A; Canfield P C; Harmon B N; McQueeney R J; Goldman A I . 2008. Spin-flop transition in Gd5Ge4 observed by x-ray resonant magnetic scattering and first-principles calculations of magnetic anisotropy. Physical Review B. 77:064425. abstract
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Starowicz P; Liu C; Khasanov R; Kondo T; Samolyuk G; Gardenghi D; Lee Y; Ohta T; Harmon B; Canfield P; Bud'ko S; Rotenberg E; Kaminski A . 2008. Direct observation of a Fermi surface and superconducting gap in LuNi2B2C. Physical Review B. 77:134520. abstract
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Kreyssig A; Green M A; Lee Y; Samolyuk G D; Zajdel P; Lynn J W; Bud'ko S L; Torikachvili M S; Ni N; Nandi S; Leao J B; Poulton S J; Argyriou D N; Harmon B N; McQueeney R J; Canfield P C; Goldman A I . 2008. Pressure-induced volume-collapsed tetragonal phase of CaFe2As2 as seen via neutron scattering. Physical Review B. 78:184517. abstract
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Paudyal D; Mudryk Y; Lee Y B; Pecharsky V K; Gschneidner K A J; Harmon B N . 2008. Understanding the extraordinary magnetoelastic behavior in GdNi. Physical Review B. 78:184436. abstract
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Lu Y; Cho M H; Kim J; Lee Y; Rhee J; Lee J H . 2008. Control of Diffracted Magneto-Optical Enhancement in Ni Gratings. Ieee Transactions on Magnetics. 44:3300-3302. abstract
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Liu C; Samolyuk G D; Lee Y; Ni N; Kondo T; Santander-Syro A F; Bud'ko S L; McChesney J L; Rotenberg E; Valla T; Fedorov A V; Canfield P C; Harmon B N; Kaminski A . 2008. K-Doping Dependence of the Fermi Surface of the Iron-Arsenic Ba1-xKxFe2As2 Superconductor Using Angle-Resolved Photoemission Spectroscopy. Physical Review Letters. 101:177005. abstract
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2007
Liu J; Trivedi N; Lee Y B; Harmon B N; Schmalian J . 2007. Quantum phases in a doped mott insulator on the Shastry-Sutherland lattice. Physical Review Letters. 99:227003. abstract
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Lee Y; Harmon B N; Goldman A I; Lang J C . 2007. Temperature dependent x-ray magnetic circular dichroism in Er2Fe17. Journal of Applied Physics. 101:09G525. abstract
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Haskel D; Lee Y B; Harmon B N; Islam Z; Lang J C; Srajer G; Mudryk Y; Gschneidner K A; Pecharsky V K . 2007. Role of Ge in bridging ferromagnetism in the giant magnetocaloric Gd-5(Ge1-xSix)(4) alloys. Physical Review Letters. 98:247205. abstract
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Cai-Zhuang Wang

Scientist II
Address
A506 Zaffarano Hall
Iowa State University
Ames, IA 50011
Phone 515-294-6934
Fax 515-294-0689
Email wangcz@ameslab.gov

Research Interests

  • Condensed matter physics and computational materials science
  • develop tight-binding potentials and tight-binding molecular dynamics method for materials simulations
  • atomistic modeling and simulation study of structural, dynamical and electronic properties as well as phase transformation of condensed matter systems and molecules, including:
    • liquid and amorphous materials
    • defects
    • surfaces
    • clusters
    • biological molecules
  • develop genetic algorithm for global structure optimization and Gutzwiller density functional theory and computational code for studying ground state energy and properties of strongly correlated electron systems
  • ab initio calculation and tight-binding molecular dynamics simulation studies of formations, structures, and stabilities of surface-based nanostructures

        Project Affiliations:
        

(Chronologically most recent on top)Education

  • Ph.D. Condensed Matter Physics, Intl. School for Adv. Studies (SISSA), Trieste, Italy, 1986
  • B.S. Physics, University of Science and Technology of China, Hefei, China, 1982

(Chronologically most recent on top)Professional Appointments

  • 2008 Senior Scientist, Ames Laboratory
  • 1996 - 2008 Physicist, Ames Laboratory
  • 1992 - 1996 Associate Physicist, Ames Laboratory
  • 1987 - 1992 Postdoctoral Fellow, Ames Laboratory and Microelectronics Research Center, Iowa State University
  • 1987 Postdoctoral Fellow, International School for Advanced Studies, Trieste, Italy

(Chronologically most recent on top)Honors & Awards

  • 1996 U.S. D.O.E. Materials Science award for Sustained Outstanding Research in Solid State Physics

(Chronologically most recent on top)Publications with the Ames Laboratory

2007
Lee G D; Wang C Z; Yu J; Yoon E; Hwang N M; Ho K M . 2007. Formation of carbon nanotube semiconductor-metal intramolecular junctions by self-assembly of vacancy defects. Physical Review B. 76:165413. abstract
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Yao Y X; Wang C Z; Ho K M . 2007. Cluster-in-jellium model and icosahedral ordering tendencies in liquid Al alloys. Physical Review B. 76:174209. abstract
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Chan T L; Yao Y X; Wang C Z; Lu W C; Li J; Qian X F; Yip S; Ho K M . 2007. Highly localized quasiatomic minimal basis orbitals for Mo from ab initio calculations. Physical Review B. 76:205119. abstract
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Lu N; Ciobanu C V; Chan T L; Chuang F C; Wang C Z; Ho K M . 2007. The structure of ultrathin H-passivated [112] silicon nanowires. Journal of Physical Chemistry C. 111:7933-7937. abstract
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Hupalo M; Chan T L; Wang C Z; Ho K M; Tringides M C . 2007. Interplay between indirect interaction and charge-density wave in Pb-adsorbed In(4x1)-Si(111). Physical Review B. 76:045415. abstract
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Li M; Evans J W; Wang C Z; Hupalo M; Tringides M C; Chan T L; Ho K M . 2007. Strongly-driven coarsening of height-selected Pb islands on Si(111). Surface Science. 601:L140-L144. abstract
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