La_(2/3)Ca_(1/3)MnO_3复合材料体系的对比研究  

Comparing the Difference of La_(2/3)Ca_(1/3)MnO_3 Composite Material System

作　　者：庄彬[1] 韩森[1] 张裕祥[1] 陈水源[1] 林应斌[1] ZHUANG Bin;HAN Shen;ZHANG Yu-xiang;CHEN Shui-yuan;LIN Ying-bin(College of Physics and Energy, Fujian Normal University, Fuzhou Fujian 350108, China)

机构地区：[1]福建师范大学物理与能源学院,福建福州350108

出　　处：《新型工业化》2017年第1期17-21,29,共6页The Journal of New Industrialization

基　　金：国家重点基础研究发展计划(973)项目(20005CB623605);福建省自然科学基金资助项目(2016J01007);福建师范大学大学生课外科技计划项目(cxxl-2016083)的资助

摘　　要：采用相同工艺条件,制备了Zn_(0.95)Co_(0.05)O(ZCO)包覆La_(2/3)Ca_(1/3)MnO_3(LCMO)体系与ZnO包覆La_(2/3)Ca_(1/3)MnO_3体系,对比研究了两种体系的电磁输运等特性。实验结果表明,不同的包裹材料对复合材料的磁电阻值和低场、高场下以及不同的温度区域内磁电阻有着不同的影响;采用低温隧穿磁电阻效应和逾渗模型解释了实验结果。Using the same process conditions,the Zn0.95Co0.05O(ZCO)coated La2/3Ca1/3MnO3(LCMO)system and ZnO coated La2/3Ca1/3MnO3system were fabricated,the electromagnetic properties of the two systems has be experimentally investigated.It is found that,there are different magnetic field dependence of magnetoresistance in different temperature ranges between the different package materials,which indicates the presence of different magnetoresistance mechanisms.Based on the spin-polarized tunneling model and percolation model,the experimental facts are well explained.

关 键 词：凝聚态物理 钙钛矿锰基氧化物 复合材料 磁电阻 

分 类 号：O484.43[理学—固体物理]