通过在传统的烧结工艺上加上球磨工艺制备了单相La2/3Ca1/3MnO3氧化物,研究了球磨对氧化物的结构和磁性能的影响,发现晶格常数和晶胞体积增大,但晶体结构类型基本不变,仍为钙钛矿四方相结构,而交流磁化率、磁化强度、居里温度减小。球磨引起氧的欠缺、无序效应,对电阻有一定的影响。
Perovskite-type maganese oxide La2/3Ca1/3MnO3 was prepared by solid sintering and ball milling with materials of at least 99.99% purity.The structure and magnetic properties of La2/3Ca1/3MnO3 were studied in this paper.Experimental results observed for the oxides La2/3Ca1/3MnO3 revealed that the structure and magnetic properties of La2/3Ca1/3MnO3 have affected obviously with increasing ball milling time.
参考文献
[1] | ZHAO Tong-yun;LI Min;ZHAO Xue-gen;WANG Fang-wei;LI Yun-fei;SHEN Bao-gen;ZHAO Jian-gao .Negative Magnetoresistance Effect in La-Pb-Mn-O Bulk Manganese Oxides[J].Chinese physics letters,1996(2):129-132. |
[2] | Cai JW;Wang C;Shen BG;Zhao JG;Zhan WS;; .Colossal magnetoresistance of spin-glass perovskite La0.67Ca0.33Mn0.9Fe0.1O3[J].Applied physics letters,1997(12):1727-1729. |
[3] | Sun JR.;Shen BG.;Wong HK.;Rao GH. .Doping effects arising from Fe and Ge for Mn in La0.7Ca0.3MnO3[J].Applied physics letters,1998(20):2998-3000. |
[4] | Wang Z H;Shen B G;Tang N et al.Colossal magnetoresistance in cluster glass-like insulator La0.67Sr0.33(Mn0.8Ni0.2)O3[J].Journal of Applied Physics,1999,85:5399. |
[5] | Li Runwei;Wang Zhihong;Chen Xin et al.Doping effects arising from the substitution of Ti for Mn in thperovskite compounds La2/3Ca1/3MnO3[J].物理学报,1999,48:s105. |
[6] | Jin Zhiqiang;Qin Hongxia;Zhang Jianrong et al.Crystallization dynamics and magnetoresistance of La0.7Ca0.3MnO3 synthesized by mechanical alloying[J].物理学报,1999,48:s230. |
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