1. Lockheed Missiles & Space Company, Inc., Research & Development Division, Palo Alto, CA 94304–1191, USA
2. Department of Physics, Tufts University, Medford, MA 02155, USA
3. Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
4. Space Science Laboratory, NASA Marshall Space Flight Center, Huntsville, AL 35812, USA
5. American Physical Society, 335 East 45th Street, New York, NY 10017 and Department of Physics, Brooklyn College, Brooklyn, NY 11210, USA
6. Department of Physics, University of Alabama in Huntsville, Huntsville, AL 35899, USA
7. Magnetic Materials Group, IMSE, National Bureau of Standards, Gaithersburg, MD 20899, USA