1. Department of Applied Physics, Tokyo University of Science, Katsushika, Tokyo 125-8585, Japan
2. Department of Electrical and Electronics Engineering, Kagoshima University, Kagoshima 890-0065, Japan
3. Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
4. Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
5. Photon Factory, KEK, Tsukuba, Ibaraki 305-0801, Japan
6. Department of Physics, Tokyo University of Science, Noda, Chiba 278-8510, Japan
7. Center for Spintronics Research Network, Osaka University, Toyonaka, Osaka 560-8531, Japan