1. Faculty of Science and Engineering, Ishinomaki Senshu University, Ishinomaki, Miyagi 986-8580, Japan
2. Super Computing and Information Sciences Center, Iwate University, Morioka 020-8550, Japan
3. Institute for Materials Research, Tohoku University, Sendai 980-8857, Japan
4. National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
5. The Research Institute for Electric and Magnetic Materials, Sendai 982-0807, Japan