1. a Hewlett-Packard Laboratories , 3-2-2 Sakado, Takatsu-ku, Kawasaki-shi, 213, Japan
2. b Hewlett-Packard Laboratories , 3500 Deer Creek Road, Palo Alto, CA 94304, USA
3. c Material Science division , Argonne National Laboratory , Argonne, IL, 60439, USA