1. Department
of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
2. Center
for Spintronics Research Network (CSRN), Graduate School of Engineering
Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
3. Laboratoire
de Chimie Théorique, University of Namur, rue de Bruxelles,
61, 5000 Namur, Belgium