1. National Institute of Advanced Industrial Science and Technology (AIST) 2266-98 Anagahora, Shimoshidami, Moriyama-ku Nagoya 463-8560 Japan
2. Present address: Mitsubishi Material Electric Co., Ltd. (MMEC) 3-1-6 Barajima, Akita-shi Akita 010-8585 Japan
3. Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasuga koen Kasuga 816-8580 Japan
4. Present address: UAP Owl Association 2-1-23 Hikarigaoka, Hakata-ku Fukuoka 812-0874 Japan
5. Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan