Open AccessReproducible low-current resistive switching of metal/Pr0.7Ca0.3MnO3/Pt junctions with a point-contact top electrode
Author(s) -
Gang Jian-Lei,
Songlin Li,
Yang Meng,
Liao Zhao-Liang,
Xiaomeng Liang,
Dongmin Chen
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.5730
Subject(s) - materials science , electrode , current (fluid) , electrical conductor , optoelectronics , resistive touchscreen , thermal conduction , electrical resistivity and conductivity , electrical contacts , platinum , electrical engineering , chemistry , composite material , biochemistry , engineering , catalysis
Current-voltage I-V and the electrical pulse induced resistive switching EPIRcharacteristics of metal/Pr0.7Ca0.3MnO3/Pt sandwich structures, where the metal is a point-contact Pt or W electrode, are investigated by using a home-made conductive AFM. The structures with both Pt and W tips behaves as rather reproducible bipolar resistive switching RS with an RS ratio larger than 100. However W/Pr0.7Ca0.3MnO3/Pt structures shows EPIR under a compliance current of 10 nA and reproducible bipolar RS under a compliance current of 100 pAwhich is about three orders lower than the published values and shows the potential applications in low power memory device. Further analysis of I-V characteristics at different positions of sampleunder different current compliances with different contact areas of device suggests that an enhanced oxygen vacancy migration due to point contact induced local intense electrical field gives rise to a stable RS for Pt/Pr0.7Ca0.3MnO3/Pt devices.