LIU Xiang ¹ ,HU Juntao ¹ ,YAN Lei ², DUAN Yunbiao ¹, CHU Qingmei ¹ ,FENG Weiguang ¹ ,PAN Feng ¹

(1. Kunming University of Science and Technology, Kunming, Yunnan 650051; 2. Chuxiong Normal University, Chuxiong, Yunnan 675000)

Abstract: In this paper, La_1-xCa_xMnO₃ with x=0.2, 0.33 and 0.9 crystal targets have been fabricated by co-precipitation. R-T and x ray diffraction show that pure La_1-xCa_xMnO₃ crystal targets have been obtained by co-precipitation at 1200℃ for 24 hours.TM -I and TCR are 253K and 3.2% respectively. With x doping increased, TCR is larger and TP is lower, and lattice constant of La_1-xCa_xMnO₃ is linearly decreased.

Keywords: rare earth oxide, La_1-xCa_xMnO₃, Co-precipitation, (NH4)2CO3 Received on