1. Advanced Industrial Science and Technology (AIST), 2-17-2-1, Tsukisamu-Higashi, Toyohira-ku, Sapporo, 062-8517 Japan
2. School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, 669-1337 Japan
3. Primary Cell Co., Ltd., Kita 21 Nishi 12, Kita-ku, Sapporo, 001-0021 Japan
4. Division of Applied Physics, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, 060-8628 Japan