1. a Yokohama City Univ. , Yokohama , 236 , Japan
2. b RITE, Kizu , Kyoto , 619–02 , Japan
3. c Central Res. Lab. Matsushita Elec. , Seikacho, Kyoto , 619–02 , Japan
4. d Dept. of Mater. Sci. and Eng. , Penn. State Univ. , Univ. Park , PA , 16802 , USA
5. e Dept. of Mech. Eng. & Mater. Sci. , Duke Univ. , Durham , NC , 27708–0300 , USA