1. Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow Region,
142432 Russia
2. Research
Center for Low Temperature
and Materials Sciences, Kyoto University, Kyoto 606-8501, Japan
3. Institute of Solid State Physics RAS, Chernogolovka, Moscow Region, 142432
Russia
4. Faculty of Agriculture, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku,
Nagoya 468-8502, Japan