[2] Sanghera J S, Aggarwal I D. Journal of Non-Crystalline Solids, 1999, (256-257): 6.
[3] Turnbull D A, Sanghera J S, Nguyen V Q. Materials Letters, 2004, 58(1-2): 51.
[4] Cardinal T, Richardson K A, Shim H. Journal of Non-Crystalline Solids, 1999, (256-257): 353.
[5] Guorong C, Jinjian C. Journal of the American Ceramic Society, 1998, 81: 1695.
[6] Tao H, Dong G, Zhai Y. Solid State Communications, 2006, 138(10-11): 485.
[8] Balakrishnan M, Kozick M N, Poweleit C. Journal of Optoeletronics and Advanced Materials, 2007, 9: 3241.
[9] Asami T, Matsuishi K, Onari S, et al. Journal of Non-Crystalline Solids, 1998, 226 (1-2): 92.
[10] Asami T, Matsuishi K, Onari S, et al. Journal of Non-Crystalline Solids, 1997, 211(1-2): 89.
[12] Fayek S A. Infrared Physics & Technology, 2005, 46(3): 193.
[13] Kotsalas I P, Papadimitriou D, Raptis C. Journal of Non-Crystalline Solids, 1998, 226: 85.
[14] Savova E, Skordeva E, Vateva E. Journal of Physics and Chemistry of Solids, 1994, 55(7): 575.
[15] Tauc J, Menth A. Journal of Non-Crystalline Solids, 1972, (8-10): 569.
[16] Koudelka L, Frumar M. Journal of Non-Crystalline Solids, 1980, 41: 171.
[17] Takebe H, Hirakawa T, Ichiki T. Journal of the Ceramic Society of Japan, 2003, 111: 572.
[18] Lin C, Tao H, Wang Z. Journal of Non-Crystalline Solids, 2009, 355(7): 438.
[19] Petit L, Carlie N, Adamietz F. Materials Chemistry and Physics, 2006, 97(1): 64.
[20] Wang X F, Gu S X, Yu J G. Solid State Communications, 2004, 130(7): 459.
[21] Zhong Boqiang. Journal of Non-Crystalline Solids, 1987, (95-96): 295.
[22] Nazabal V, Němec P, Jurdyc A M. Thin Solid Films, 2010, 518(17): 4941.
[23] Pan R K, Tao H Z, Zang H C. Journal of Non-Crystalline Solids, 2011, 357 (11-13): 2358.