Crystal Structure and Photoluminescence Properties of Eu-Doped Y2O3 Nanoparticles Prepared by Mechanical Milling

1Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies, Yongin 449-791, South Korea 2Faculty of Engineering Physics and Nanotechnology, VNU-University of Engineering and Technology, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam 3Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea 4Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam 5Department of Materials Science and Engineering, Chungnam National University, Daejeon 305-764, South Korea