1. Department of Materials Engineering Science Graduate School of Engineering Science Osaka University 560‐8531 Toyonaka, Osaka Japan
2. Center for Spintronics Research Network (CSRN) Graduate School of Engineering Science Osaka University 560‐8531 Toyonaka, Osaka Japan
3. Institute for Molecular Science 38 Nishigo‐Naka, Myodaiji 444‐8585 Okazaki Japan