[1] Toyota Technological Institute, 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan
[2] Laboratoire des Milieux Desordonnes et Heterogenes,Universite, Pierre et Marie Curie, CNRS, UMR 7603, Tour 22, Case 86, 4 place Jussieu, 75252 Paris Cedex 05, France
[3] Department of Electrical and Electronic Engineering, Tottori University, Koyama, Tottori 680, Japan
[4] Central Research Laboratory, Japan Energy Corporation, 3-17-35 Niizo-Minami, Toda 335, Japan
[5] Department of Electrical Engineering, Ohio State University, 2015 Neil Avenue, Columbus, OH 43210, United States