PERSONAL HISTORY
B.S. 1983, Chemical Engineering, Wayne State University, Detroit, MI; Research Staff Engineer, Energy Conversion Devices/Ovonic Synthetic Materials, Inc., Troy, MI, 1983-88, Ames Laboratory 1988-present.

RESEARCH INTERESTS
Rapid solidification processes, fabrication of modified ternary and intermetallic rare earth compounds and exploration of their magnetic and electronic properties, fabrication of magnetic glasses and nanostructured materials, and exploration of microstructure / electronic property relationships using magnetometry, thermal analysis, diffraction, and electron microscopy techniques.

SELECTED PUBLICATIONS
Y. Janssen, K.W. Dennis, R. Prozorov, P.C. Canfield, and R.W. McCallum
"Exotic (anti)ferromagnetism in single crystals of Pr 6Ni 2Si 3,” Phys. Rev. B: Condens. Matter & Mater. Phys., Vol. 77(21), 214407/1-214407/8 (2008).

S. Jia, N. Ni, G.D. Samolyuk, A. Safa-Sefat, K.W. Dennis, H. Ko, G.J. Miller, S.L. Bud'ko, and P.C. Canfield
“Variation of the magnetic ordering in GdT 2Zn 20 (T = Fe, Ru, Os, Co, Rh and Ir) and its correlation with the electronic structure of isostructural YT 2Zn 20,” Phys. Rev. B: Condens. Matter & Mater. Phys., Vol. 77(10), 104408/1-104408/14 (2008).

 J.M. Hill, R.J. McQueeney, R. Wu, K.W. Dennis, R.W. McCallum, M. Huang, and T.A. Lograsso
“Low temperature heat capacity of Fe 1-xGa x alloys with large magnetostriction,” Phys. Rev. B: Condens. Matter & Mater. Phys., Vol. 77(1), 014430/1-014430/5 (2008).

L.S. Chumbley, O. Ugurlu, R.W. McCallum, K.W. Dennis, Y. Mudryk, K.A. Gschneidner, Jr. , and V.K. Pecharsky
“Linear microstructural features in R 5(Si,Ge) 4-type alloys: Difficulties in identification,” Acta Mater., 56(3), 527-536 (2007).

 M.J. Kramer, H. Mecco, K.W. Dennis, E. Vargonova, R.W. McCallum, and R.E. Napolitano
“Rapid solidification and metallic glass formation - Experimental and theoretical limits,” J. Non-Cryst. Solids, 353(32-40), 3633-3639 (2007).