We would like to thank Emeritus Profs. Masahiro Hirama;
Hachiro Nakanishi;
Kunio Arai;
and Assoc. Prof. Hiroshi Tada of Tohoku University and Dr. Hideo Hattori of FromSeeds Co;
who provided fruitful discussion. We are very grateful to Prof. Fumi Nagatsugi;
Prof. Hidetoshi Oikawa;
Assoc. Prof. Ilya D. Gridnev;
Assistant Prof. Anh T. N. Dao of Tohoku University and Dr. Kiyotaka Hatakeda of AIST;
for their help on the compound measurements. This work was performed under the Cooperative Research Program of Network Joint Research Center for Materials and Devices;