1. Mechanics and Robotics Course, Faculty of Advanced Science and Technology, Ryukoku University, Otsu 520-2194, Shiga, Japan
2. Center for Advanced High Magnetic Fields, Graduated School of Science, Osaka University, Toyonaka 560-0043, Osaka, Japan
3. Research Institute for Engineering and Technology, Tohoku Gakuin University, Tagajo 985-8537, Miyagi, Japan
4. Institute for Materials Research, Tohoku University, Sendai 980-8577, Miyagi, Japan
5. Graduate School of Science and Engineering, Yamagata University, Yonezawa 992-8510, Yamagata, Japan