*H. Lee1,2, S. Lee1, J. Yun1, S. Baek1, Y. Kwon1, K. Park1, Y. Song1, B. Kim1, H. Hwang2, D. Jeong1 (1.Korea National Institute of Rare Metals, Korea Institute of Industrial Technology, Korea, 2.Department of Materials Science and Engineering Inha University, Korea)