Na, Seungmin; Park, Yongwoon; Hwang, Anna; Ha, Jeongsook; Kim, Younguk; Khim, Jeehyeong
ArticleIssue Date2007CitationJAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, v.46, no.7B, pp.4775 - 4778PublisherJAPAN SOC APPLIED PHYSICS