1. Materials Science Division; Argonne National Laboratory; Argonne IL 60439 USA
2. Department of Materials Science and Engineering; University of Illinois-Urbana Champaign; Urbana IL 61801 USA
3. Materials Research Laboratory; University of Illinois-Urbana Champaign; Urbana IL 61801 USA
4. Department of Chemistry; Northwestern University; Evanston IL 60208 USA
5. Physics Division; Argonne National Laboratory; Argonne IL 60439 USA
6. SuperPower Corp; Schenectady NY 12304 USA
7. Department of Mechanical Engineering and Texas Center for Superconductivity; University of Houston; Houston TX 77204 USA
8. Departments of Physics, Electrical and Mechanical Engineering; University of Illinois at Chicago; Chicago IL 60607 USA
9. Department of Physics; Northern Illinois University; DeKalb IL 60115 USA