Affiliation: | 1. Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan;2. The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwa-no-ha, Chiba 277-8581, Japan;3. Fachbereich Physik und Zentrum für Materialwissenschaften, Philipps-Universität, 35032 Marburg, Germany;4. Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan |