Faculty Profile

E-mail address: hellstrom@asc.magnet.fsu.edu
B343 CEB, (850) 410-6320

247 Shaw Building
(850) 645-7489

Eric E. Hellstrom, is professor of Mechanical Engineering. His interests are in electronic ceramic materials, with an emphasis on high-temperature superconductors. These include MgB₂, Bi₂Sr₂CaCu₂O_x, (Bi,Pb)₂Sr₂Ca₂Cu₃O_x, YBa₂Cu₃O_7-x, and the new pnictide superconductors. His group has worked on processing these materials, understanding the relation between the heat treatment and how the microstructure and electromagnetic properties of the superconductors develop. He has worked on the high-temperature superconductors since the mid-1980s when they were discovered. He is part of the Applied Superconductivity Center within the National High Magnetic Field Laboratory, where he works with other materials people and magnet designers on the next generation of high-field magnets.

Eric Hellstrom received his BS degree from the University of Utah in Materials Science in 1973 and his MS and PhD degrees in Materials Science from Stanford University in 1974 and 1978. He spent 2 years as a postdoctoral fellow in The Netherlands at the State University of Utrecht. On returning the US he was a member of the technical staff at Sandia National Lab for 5 years. He then moved to the University of Wisconsin-Madison where he was a faculty member in the Department of Materials Science for 22 years before moving to FSU in 2007.

Representative publications

• A. Yamamoto, J. Jiang, C. Tarantini, N. Craig, A. A. Polyanskii, F. Kametani, F. Hunte, J. Jaroszynski, E. E. Hellstrom, D. C. Larbalestier, R. Jin, A. S. Sefat, M. A. Mcguire, B. C. Sales, D. K. Christen, and D. Mandrus, "Evidence for electromagnetic granularity in the polycrystalline iron-based superconductor LaO_0.89F_0.11FeAs", App. Phys. Lett. 92 (2008) 252501
   
• B.J. Senkowicz, R.J. Mungall, Y. Zhu, J. Jiang, P.M. Voyles, E.E. Hellstrom, and D.C. Larbalestier, "Nanoscale grains, high irreversibility field, and large critical current density as a function of high energy ball milling time in C-doped magnesium diboride", Supercond. Sci. Tech. 21 (2008) 035009
   
• H.C. Freyhardt and E.E. Hellstrom, "High-temperature superconductors: a review of YBa₂Cu₃O_6+x and (Bi,Pb)₂Sr₂Ca₂Cu₃O₁₀", Cryogenic Engineering: Fifty Years of Progress Eds. K.D. Timmerhaus and R.P Reed, Springer Verlag, (2006) 309-339.
   
• A. Matsumoto, H. Kumakura, H. Kitaguchi, B.J. Senkowicz, M.C. Jewell, E.E. Hellstrom, Y. Zhu, P.M. Voyles, and D.C. Larbalestier, "Evaluation of connectivity, flux pinning, and upper critical field contributions to the critical current density of bulk pure and SiC-alloyed MgB₂", Appl. Phys. Letts. 89 (2006) 132508-1-3
   
• J. Jiang, B.J. Senkowicz, D.C. Larbalestier and E.E. Hellstrom, "Influence of Boron Powder Purification on the Connectivity of Bulk MgB₂", Supercond. Sci. Tech. 19 (2006) L33-L36
   
• E.E. Hellstrom, Y. Yuan, J. Jiang, X.Y. Cai, D.C. Larbalestier, and Y. Huang, "Review of Overpressure Processing Ag-Sheathed (Bi,Pb)₂Sr₂Ca₂Cu₃O_x Wire", Supercond. Sci. Tech. 18 (2005) S325-31
   
• D. Wesolowski, M.O. Rikel, J. Jiang, S. Arsac, and E.E. Hellstrom, "Reactions Between Oxides and Ag-sheathed Bi₂Sr₂CaCu₂O_x Conductors", Supercond. Sci. Tech. 18 (2005) 934-943.