*H. Lee^1,2, 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)