Her, J. L.J. L.HerLiu, H. L.H. L.LiuShen, C. H.C. H.ShenLiu, R. S.R. S.LiuSheu, H. SH. SSheu2010-09-202018-07-102010-09-202018-07-102006-01http://ntur.lib.ntu.edu.tw//handle/246246/204922en-USEffect of Ca Doping on the Optical Propeties of La1.2Sr1.8Mn2O7journal article