[1] Hou J S, Yin X, Huang F Q, et al. Materials Research Bulletin, 2012, 47(6): 1295.
[2] Hou J S, Yin X, Fang Y Z, et al. Optical Materials, 2012, 34(8): 1394.
[3] Yamada Suzuya, Emoto Hideyuki, Ibukiyama Masahiro, et al. Journal of the European Ceramic Society, 2012, 32(7): 1355.
[4] Hu R, Luo X, Feng H, et al. Journal of Luminescence, 2012, 132(5): 1252.
[6] Wang Z L, Zhang Y L, Xiong L, et al. Current Applied Physics, 2012, 12(4): 1084.
[9] Ha M G, Lee J H, Bae J S, et al. Current Applied Physics, 2011, 11(6): 1379.
[10] Li X P, Chen B J, Shen R S, et al. Journal of Physics D-Applied Physics, 2011, 44(33): 335403.
[11] Meng Q Y, Zhang Q, Li M, et al. Acta Physica Sinica, 2012, 61(10): 447.
[12] Pereira P F S, de Moura A P, Nogueira I C, et al. Journal of Alloys and Compounds, 2012, 526: 11.
[13] Ju G F, Hu Y H, Chen L, et al. Optics and Laser Technology, 2012, 44(1): 39.
[14] Wu X, Huang Y L, Seo H. J. Ceramics International, 2011, 37(7): 2323.
[16] Toda Kenji, Kameo Yutaka, Ohta Masatoshi, et al. Journal of Alloys and Compounds, 1995, 218(2): 228.
[17] Ha Myounggyu, Lee Jinhwa, Bae Jongseong, et al. Current Applied Physics, 2011, 11(6): 1379.
[18] Samantaray C B, Nanda Goswami M L, Bhattacharya D, et al. Materials Letters, 2004, 58(17-18): 2299.
[20] Sohn K S, Park D H, Cho S H, et al. Chemistry of Materials, 2006, 18(7): 1768.
[21] Pfaff G. Journal of the European Ceramic Society, 1992, 9(4): 293.
[22] Beznosikov B V, Aleksandrov K S. Crystallography Reports, 2000, 45(5): 792.
[23] Ceh M. Acta Chim. Slov., 2001, 48: 63.
[24] Thiel C W, Cruguel H, Wu H, et al. Physical Review B, 2001, 64(8): 085107.
[25] Shang Chunyu, Jiang Hongbo, Shang Xiaohong, et al. Journal of Physical Chemistry C, Harbin Institute of Technology, 2011, 115(6): 2630.