R. William McCallum

None
Address
106 Wilhelm Hall
The Ames Laboratory
Ames, IA 50011-3020
Phone 515-294-4736
Fax 515-294-4291
Email mccallum@ameslab.gov

Research Interests

  • Magnetic and electronic properties of ternary rare earth compounds
  • Permanent magnet materials
  • Development of microstructure during rapid solidification processing
  • High temperature superconductors
  • Effect of microstructure on magnetic and superconducting properties
  • Composite magnetostrictive materials
  • Preparation pathways for novel materials
  • Growth of single crystals of novel materials

        Project Affiliations:

(Chronologically most recent on top)Education

  • Postdoctoral Fellowship: Institute for Pure and Applied Physical Sciences, University of California, San Diego, 1977 - 1978
  • Ph.D. Physics, University of California, San Diego, 1977
  • M.S. Physics, University of California, San Diego, 1973
  • B.A. Mathematics and Physics, Carleton College, 1969

(Chronologically most recent on top)Professional Appointments

  • 1986 - present Senior Materials Scientist, Ames Laboratory, USDOE, Iowa State University
  • 1991 - present Adjunct Professor, Materials Science and Engineering Dept., Iowa State University
  • 1992 - 1996 Director, Rare-earth Information Center, Iowa State University, Ames, IA
  • 1987 - 1991 Adjunct Associate Professor, Materials Science and Engineering Dept., Iowa State University
  • 1982 - 1986 Senior Research Physicist, Energy Conservation Devices, Troy, MI
  • 1978 - 1982 Scientific Staff Member, Institut fur Festkorperforshung der Kernforschungsanlage Julich, Julich, West Germany.

(Chronologically most recent on top)Honors & Awards

  • 1997 R&D 100 Award, Nanocrystalline Composite Coercive Magnet Powders
  • 1996 DOE Materials Sciences Award, Significant Implication for DOE Related Technologies, Metallurgy and Ceramics
  • 1996 STE Short Term Fellow International Superconductivity Technology Center, Tokyo, Japan
  • 1995 DOE Materials Sciences Award, Sustained Outstanding Research in Solid State Physics
  • 1988 STE Short Term Fellow National Research Institute for Metals, Tokyo, Japan

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

2013
Zhang Q; Tian W; Li H F; Kim J W; Yan J Q; McCallum R W; Lograsso T A; Zarestky J L; Bud'ko S L; McQueeney R J; Vaknin D . 2013. Magnetic structures and interplay between rare-earth Ce and Fe magnetism in single-crystal CeFeAsO. Physical Review B. 88:174517. abstract
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Palasyuk A; Blomberg E; Prozorov R; Yue L; Kramer M J; McCallum R W; Anderson I E; Constantinides S . 2013. Advances in Characterization of Non-Rare-Earth Permanent Magnets: Exploring Commercial Alnico Grades 5-7 and 9. JOM. 65:862-869. abstract
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Nlebedim I C; Levin E M; Prozorov R; Dennis K W; McCallum R W; Jiles D C . 2013. Magnetic and Thermoelectric Properties of Cobalt Ferrite. IEEE Transactions on Magnetics. 49:4269-4272. abstract
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Xing Q; Miller M K; Zhou L; Dillon H M; McCallum R W; Anderson I E; Constantinides S; Kramer M J . 2013. Phase and Elemental Distributions in Alnico Magnetic Materials. IEEE Transactions on Magnetics. 49:3314-3317. abstract
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Hahn S E; Tucker G S; Yan J Q; Said A H; Leu B M; McCallum R W; Alp E E; Lograsso T A; McQueeney R J; Harmon B N . 2013. Magnetism dependent phonon anomaly in LaFeAsO observed via inelastic x-ray scattering. Journal of Applied Physics. 113:17e153. abstract
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Ramazanoglu M; Lamsal J; Tucker G S; Yan J Q; Calder S; Guidi T; Perring T; McCallum R W; Lograsso T A; Kreyssig A; Goldman A I; McQueeney R J . 2013. Two-dimensional magnetic interactions in LaFeAsO. Physical Review B. 87:140509. abstract
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Sun W X; Sun W Z; Kessler M R; Bowler N; Dennis K W; McCallum R W; Li Q; Tan X L . 2013. Multifunctional Properties of Cyanate Ester Composites with SiO2 Coated Fe3O4 Fillers. ACS Applied Materials & Interfaces. 5:1636-1642. abstract
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Hahn S E; Tucker G S; Yan J Q; Said A H; Leu B M; McCallum R W; Alp E E; Lograsso T A; McQueeney R J; Harmon B N . 2013. Magnetism-dependent phonon anomaly in LaFeAsO observed via inelastic x-ray scattering. Physical Review B. 87:104518. abstract
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Sun W X; Sun W Z; Kessler M R; Bowler N; Dennis K W; McCallum R W; Li Q; Tan X L . 2013. Multifunctional Properties of Cyanate Ester Composites with SiO2 Coated Fe3O4 Fillers. ACS Applied Materials & Interfaces. 5:1636-1642. abstract
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Alam A; Khan M; McCallum R W; Johnson D D . 2013. Site-preference and valency for rare-earth sites in (R-Ce)(2)Fe14B magnets. Applied Physics Letters. 102:042402. abstract
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