Electric current-induced giant electroresistance in La0.36Pr0.265Ca0.375MnO3 thin films  

作　　者：孙颖慧 赵永刚 王荣明 

机构地区：[1]Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science,School of Mathematics and Physics,University of Science and Technology Beijing,Beijing 100083,China [2]Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics,Tsinghua University,Beijing 100084,China [3]Collaborative Innovation Center of Quantum Matter,Beijing 100084,China

出　　处：《Chinese Physics B》2017年第4期377-382,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11604010);the Fundamental Research Funds for the Central Universities,China(Grant No.FRF-TP-15-097A1);the Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics,China(Grant No.KF201611)

摘　　要：The electroresistance（ER） of La_（0.36）Pr_（0.265）Ca_（0.375）MnO_3（LPCMO） epitaxial thin film was studied under various dc currents.The current effect was compared for the unpatterned film and patterned microbridge with a width of 50 μm.The value of ER in the unpatterned LPCMO film could reach 0.54 under a 1-mA current,which is much higher than ER under 1 mA for the patterned weak phase-separated La_（0.67）Ca_（0.33）MnO_3 and La_（0.85）Sr_（0.15）MnO_3 microbridges with 50-μm width.More interestingly,for the patterned LPCMO microbridge,the maximum of ER can reach 0.6 under a small current of 100 μ.A.The results were explained by considering the coexistence of ferromagnetic metallic phase with the charge-ordered phase,and the variation of the phase separation with electric current.The electroresistance（ER） of La_（0.36）Pr_（0.265）Ca_（0.375）MnO_3（LPCMO） epitaxial thin film was studied under various dc currents.The current effect was compared for the unpatterned film and patterned microbridge with a width of 50 μm.The value of ER in the unpatterned LPCMO film could reach 0.54 under a 1-mA current,which is much higher than ER under 1 mA for the patterned weak phase-separated La_（0.67）Ca_（0.33）MnO_3 and La_（0.85）Sr_（0.15）MnO_3 microbridges with 50-μm width.More interestingly,for the patterned LPCMO microbridge,the maximum of ER can reach 0.6 under a small current of 100 μ.A.The results were explained by considering the coexistence of ferromagnetic metallic phase with the charge-ordered phase,and the variation of the phase separation with electric current.

关 键 词：MANGANITES ELECTRORESISTANCE phase separation PERCOLATION 

分 类 号：O484[理学—固体物理]