1. Furuuchi Chemical Co., Tsukuba 300-0315, Japan
2. Kanazawa Institute of Technology, Hakusan, Ishikawa 924-0838 Japan
3. National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
4. National Institute of Materials Physics, Street Atomistilor 405A, 077125 Magurele, Romania
5. INOE 2000, Street Atomistilor 409, 077125 Magurele, Romania