巨磁电阻材料La1-xZnxMnO3化合物的制备工艺及其结构研究

罗广圣; 刘光华; 周正有; 甘建萍; 欧阳小吕

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航空材料学报 ›› 2008, Vol. 28 ›› Issue (4) : 46-50.

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论文

巨磁电阻材料La_1-xZn_xMnO₃化合物的制备工艺及其结构研究

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Study on Preparation and Structure of Giant Magnetoresistance La_1-xZn_xMnO₃ Compounds

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摘要

对巨磁电阻材料La1-xZnxMnO3(x=0.1,0.3,0.5,0.7,0.9,1.0)样品的制备工艺、晶体结构、微观结构进行研究。结果表明,样品ZnO与MnO2固相反应的烧结温度和时间分别大于1300℃和6h时,反应生成具有四面体结构的ZnMnO3化合物;压制成型的压力对结构具有一定影响;不同浓度的Zn2+(x=0.1,0.3,0.5,0.7,0.9)掺杂样品在1350℃烧结12h后,均具有钙钛矿结构,但掺杂浓度在大于x=0.5时有新的衍射峰,产生新的物相,从而影响巨磁电阻效应性能。

Abstract

The preparation and structure of perovskite manganese oxides were studied.When the temperature and sintering time in the solid reaction were above 1300℃ and 6h respectively,ZnO reacted with MnO2 into ZnMnO3 compound with a tetrahedron structure and the influence of molding pressure on structure was studied.The samples La1-xZnxMnO3 with different Zn2+ doping content(x=0.1,0.3,0.5,0.7,0.9) were prepared under the temperature 1350℃ and sintering time 12h,however,the other phase was formed when doping content was above 0.5 and affected giant magnetoresistance property.

导出引用

罗广圣, 刘光华, 周正有, 甘建萍, 欧阳小吕. 巨磁电阻材料La_1-xZn_xMnO₃化合物的制备工艺及其结构研究[J]. 航空材料学报, 2008, 28(4): 46-50

LUO Guangsheng, LIU Guanghua, ZHOU Zhengyou, GAN Jianping, OUYANG Xiaol¨. Study on Preparation and Structure of Giant Magnetoresistance La_1-xZn_xMnO₃ Compounds[J]. Journal of Aeronautical Materials, 2008, 28(4): 46-50

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