1. Nanomagnetism
Laboratory, Department of Physics and Astronomy, Seoul National University, Gwanak-gu,
Seoul 08826, South Korea
2. College
of Science, Department of Physics, Alfaisal University, P.O. Box 50927 Riyadh, Saudi Arabia
3. Department
of Physics, Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan