[2] [2] CHANG Cheng-kang,MAO Da-li. Thin Solid Film, 2004, 460(1-2): 48.

[3] [3] L Xing dong. Materials Chemistry and Physics, 2005, 93(2-3): 526.

[4] [4] Nag A, Kutty T R N. Journal of Alloys and Compounds, 2003, 354(1-2): 221.

[5] [5] JIA Dongdong. Optical Materials, 2003, 22(1): 65.

[6] [6] Escribano P, Marchal M, Sanjuán M L, et al. Journal of Solid State Chemistry, 2005, 178(6): 1978.

[7] [7] CHANG Chengkang, YUAN Zhaoxin, MAO Dali. Journal of Alloys and Compounds, 2006, 415(1-2): 220.

[8] [8] Holsa Jorma, Jungner Hogne, Lastusaari Mika, et al. Journal of Alloys and Compounds, 2001, 323-324: 326.

[9] [9] Arellano-Tánorr O, Meléndrez R, Pedroza-MonteroM, et al. Journal of Luminescence, 2008, 128(1): 173.

[10] [10] PENG Tianyou, LIU Huajun, YANG Huanping, et al. Materials Chemistry and Physics, 2004, 85(1): 68.

[11] [11] PENG Tianyou, YANG Huanping, PU Xuli, et al. Materials Letters, 2004, 58(3-4): 352.

[12] [12] TANG Zilong, ZHANG Feng, ZHANG Zhongtai, et al. Journal of the European Ceramic Society, 2000, 20(12):2129.

[13] [13] Sophya K R Preethi, Lu Chung-Hsin, Thirumalai J, et al. Journal of Physics D: Applied Physics, 2004, 37: 2664.

[14] [14] CHANG Chengkang, XU Jie, JIANG Ling, et al. Materials Chemistry and Physics, 2006, 98(2-3): 509.

[16] [16] F UZuoling, ZHOU Shihong, PANT ianqi, et al. Journal of Solid State Chemistry, 2005, 178(1): 230.