CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Transport properties and anomalous fatigue effect of Ag/Bi0.9La0.1FeO3/La0.7Sr0.3MnO3 heterostructures |
Gao Rong-Li (高荣礼)a b, Fu Chun-Lin (符春林)a, Cai Wei (蔡苇)a, Chen Gang (陈刚)a, Deng Xiao-Ling (邓小玲)a, Yang Huai-Wen (杨怀文)b, Sun Ji-Rong (孙继荣)b, Shen Bao-Gen (沈保根)b |
a School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract The transport properties and fatigue effect of Ag/Bi0.9La0.1FeO3/La0.7Sr0.3MnO3 heterostructures are described. By examining the I-V curves, an anomalous fatigue effect was found and its influences on resistive states were studied. I-V curves combined with C-f spectra were used to directly analyze the transport properties and fatigue effect. Compared to the first I-V cycle state, this structure shows more than one order increase of resistance after 100 cycles of “I-V curve training”. The redistribution of oxygen vacancies in the depletion layer of Ag/Bi0.9La0.1FeO3 is believed to be responsible for the different resistance mechanisms and tenfold magnitude drop in resistance. The resistive switching is understood to be caused by electric field-induced carrier trapping and detrapping, which changes the depletion layer thickness at the Ag/Bi0.9La0.1FeO3 interface.
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Received: 02 May 2014
Revised: 14 May 2014
Accepted manuscript online:
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PACS:
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77.22.Ej
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(Polarization and depolarization)
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77.84.-s
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(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
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77.55.Nv
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(Multiferroic/magnetoelectric films)
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77.90.+k
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(Other topics in dielectrics, piezoelectrics, and ferroelectrics and their properties)
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Fund: Project supported by the Knowledge Innovation Project of the Chinese Academy of Sciences, the Beijing Municipal Natural Science Foundation, the National Natural Science Foundation of China (Grant Nos. 51102288 and 51372283), the Natural Science Foundation Project of Chongqing, China (Grant No. CSTC2012jjA50017), and the Cooperative Project of Academician Workstation of Chongqing University of Science & Technology, China (Grant Nos. CKYS2014Z01 and CKYS2014Y04). |
Corresponding Authors:
Gao Rong-Li
E-mail: gaorongli2008@163.com
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Cite this article:
Gao Rong-Li (高荣礼), Fu Chun-Lin (符春林), Cai Wei (蔡苇), Chen Gang (陈刚), Deng Xiao-Ling (邓小玲), Yang Huai-Wen (杨怀文), Sun Ji-Rong (孙继荣), Shen Bao-Gen (沈保根) Transport properties and anomalous fatigue effect of Ag/Bi0.9La0.1FeO3/La0.7Sr0.3MnO3 heterostructures 2014 Chin. Phys. B 23 097702
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