Emergent reversible giant electroresistance in spacially confined La_(0.325)Pr_(0.3)Ca_(0.375)MnO_3 wires  

作　　者：崔丽敏 李洁 王佳 张玉 郑东宁 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics Institute of Physics,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2014年第9期6-9,共4页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant Nos.2011CBA00106 and 2014CB921401);the National Natural Science Foundation of China(Grant Nos.11174342,91321208,and 11374344)

摘　　要：Micro-patterning is considered to be a promising way to analyze phase-separated manganites. We investigate resistance in micro-patterned La0.325Pr0.3Ca0.375MnO3 wires with width of 10 μm, which is comparable to the phase separation scale in this material. A reentrant of insulating state at the metal-insulator temperature Tp is observed and a giant resistance change of over 90% driven by electric field is achieved by suppression of this insulating state. This resistance change is mostly reversible, The I-V characteristics are measured in order to analyze the origin of the giant electroresistance and two possible explanations are proposed.Micro-patterning is considered to be a promising way to analyze phase-separated manganites. We investigate resistance in micro-patterned La0.325Pr0.3Ca0.375MnO3 wires with width of 10 μm, which is comparable to the phase separation scale in this material. A reentrant of insulating state at the metal-insulator temperature Tp is observed and a giant resistance change of over 90% driven by electric field is achieved by suppression of this insulating state. This resistance change is mostly reversible, The I-V characteristics are measured in order to analyze the origin of the giant electroresistance and two possible explanations are proposed.

关 键 词：metal-insulator transition micro-wire phase separation MANGANITES 

分 类 号：O441.1[理学—电磁学]