JOURNAL OF MATERIALS RESEARCH, vol. 16, no. 11, page. 3124 - 3132, 2001-11
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, vol. 40, no. 7, page. 4470 - 4474, 2001-07
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, vol. 40, no. 3A, page. 1379 - 1383, 2001-03