The Experts below are selected from a list of 76680 Experts worldwide ranked by ideXlab platform
Jeong Won Kim - One of the best experts on this subject based on the ideXlab platform.
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microscopic origin of bipolar resistive switching of nanoscale titanium oxide thin films
Applied Physics Letters, 2009Co-Authors: Hu Young Jeong, Jeong Yong Lee, Sungyool Choi, Jeong Won KimAbstract:We report a direct observation of the microscopic origin of the bipolar resistive switching behavior in nanoscale titanium oxide films. Through a high-resolution transmission electron microscopy, an analytical transmission electron microscopy technique using energy-filtering transmission electron microscopy, and an in situ x-ray photoelectron spectroscopy, we demonstrated that the Oxygen Ions piled up at the top interface by an oxidation-reduction between the titanium oxide layer and the top Al metal electrode. We also found that the drift of Oxygen Ions during the on/off switching induced the bipolar resistive switching in the titanium oxide thin films.
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microscopic origin of bipolar resistive switching of nanoscale titanium oxide thin films
arXiv: Materials Science, 2009Co-Authors: Hu Young Jeong, Jeong Yong Lee, Sungyool Choi, Jeong Won KimAbstract:We report a direct observation of the microscopic origin of the bipolar resistive switching behavior in nanoscale titanium oxide films. Through a high-resolution transmission electron microscopy, an analytical TEM technique using energy-filtering transmission electron microscopy and an in situ x-ray photoelectron spectroscopy, we demonstrated that the Oxygen Ions piled up at top interface by an oxidation-reduction reaction between the titanium oxide layer and the top Al metal electrode. We also found that the drift of Oxygen Ions during the on/off switching induced the bipolar resistive switching in the titanium oxide thin films.
Yuichi Shimakawa - One of the best experts on this subject based on the ideXlab platform.
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low temperature reduction of brownmillerite cafeo2 5 in laalo3 cafeo2 5 heterostructures made on srtio3
Dalton Transactions, 2014Co-Authors: Noriaki Murakami, Daisuke Kan, Noriya Ichikawa, Yuichi ShimakawaAbstract:When LaAlO3/CaFeO2.5 thin-film heterostructures made on SrTiO3 were annealed with CaH2 at low temperatures below 300 °C, the brownmillerite CaFeO2.5 layer was reduced to CaFeO2 with an infinite-layer structure while both the LaAlO3 capping layer and the SrTiO3 substrate remained intact. The reduction behaviour strongly depends on the lattice matching of LaAlO3 to CaFeO2.5, suggesting that Oxygen Ions migrate through the coherently grown LaAlO3 layer of the heterostructure predominantly in the out-of-plane direction. The structural defects near the interface in the relaxed-structure LaAlO3 capping layer prevent the Oxygen Ions from migrating.
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reduction and oxidation of transition metal oxide thin films solid state chemistry with epitaxially grown thin films
Bulletin of the Chemical Society of Japan, 2013Co-Authors: Yuichi ShimakawaAbstract:Reduction and oxidation of perovskite-structure transition-metal oxide thin films are highlighted. Oxygen Ions are released from and incorporated into the perovskite-structure framework during the ...
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anisotropic Oxygen diffusion at low temperature in perovskite structure iron oxides
Nature Chemistry, 2010Co-Authors: Satoru Inoue, Noriya Ichikawa, M Kawai, Hiroshi Kageyama, Werner Paulus, Yuichi ShimakawaAbstract:The movement of Oxygen Ions through materials is important in electrolytes and separation membranes, but is rare at lower temperatures. Two different low-temperature diffusion pathways are revealed during the reduction process of CaFeO2.5 to CaFeO2. The two pathways are significantly different, resulting in anisotropy.
Hu Young Jeong - One of the best experts on this subject based on the ideXlab platform.
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microscopic origin of bipolar resistive switching of nanoscale titanium oxide thin films
Applied Physics Letters, 2009Co-Authors: Hu Young Jeong, Jeong Yong Lee, Sungyool Choi, Jeong Won KimAbstract:We report a direct observation of the microscopic origin of the bipolar resistive switching behavior in nanoscale titanium oxide films. Through a high-resolution transmission electron microscopy, an analytical transmission electron microscopy technique using energy-filtering transmission electron microscopy, and an in situ x-ray photoelectron spectroscopy, we demonstrated that the Oxygen Ions piled up at the top interface by an oxidation-reduction between the titanium oxide layer and the top Al metal electrode. We also found that the drift of Oxygen Ions during the on/off switching induced the bipolar resistive switching in the titanium oxide thin films.
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microscopic origin of bipolar resistive switching of nanoscale titanium oxide thin films
arXiv: Materials Science, 2009Co-Authors: Hu Young Jeong, Jeong Yong Lee, Sungyool Choi, Jeong Won KimAbstract:We report a direct observation of the microscopic origin of the bipolar resistive switching behavior in nanoscale titanium oxide films. Through a high-resolution transmission electron microscopy, an analytical TEM technique using energy-filtering transmission electron microscopy and an in situ x-ray photoelectron spectroscopy, we demonstrated that the Oxygen Ions piled up at top interface by an oxidation-reduction reaction between the titanium oxide layer and the top Al metal electrode. We also found that the drift of Oxygen Ions during the on/off switching induced the bipolar resistive switching in the titanium oxide thin films.
Min Kyu Yang - One of the best experts on this subject based on the ideXlab platform.
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bipolar resistive switching behavior in ti mno2 pt structure for nonvolatile memory devices
Applied Physics Letters, 2009Co-Authors: Min Kyu Yang, Jaewan Park, Jeon Kook LeeAbstract:This study examined the electrical properties of Ti/MnO2/Pt devices with stable and reproducible bipolar resistive switching behavior. The dependency of the memory behavior on the cell area and operating temperature suggest that the conducting mechanism in the low resistance states is due to the locally conducting filaments formed. X-ray photoelectron spectroscopy showed that nonlattice Oxygen Ions form at the MnO2 surface. The mechanism of resistance switching in the system examined involves the generation and recovery of Oxygen vacancies with the nonlattice Oxygen Ions.
Sungyool Choi - One of the best experts on this subject based on the ideXlab platform.
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microscopic origin of bipolar resistive switching of nanoscale titanium oxide thin films
Applied Physics Letters, 2009Co-Authors: Hu Young Jeong, Jeong Yong Lee, Sungyool Choi, Jeong Won KimAbstract:We report a direct observation of the microscopic origin of the bipolar resistive switching behavior in nanoscale titanium oxide films. Through a high-resolution transmission electron microscopy, an analytical transmission electron microscopy technique using energy-filtering transmission electron microscopy, and an in situ x-ray photoelectron spectroscopy, we demonstrated that the Oxygen Ions piled up at the top interface by an oxidation-reduction between the titanium oxide layer and the top Al metal electrode. We also found that the drift of Oxygen Ions during the on/off switching induced the bipolar resistive switching in the titanium oxide thin films.
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microscopic origin of bipolar resistive switching of nanoscale titanium oxide thin films
arXiv: Materials Science, 2009Co-Authors: Hu Young Jeong, Jeong Yong Lee, Sungyool Choi, Jeong Won KimAbstract:We report a direct observation of the microscopic origin of the bipolar resistive switching behavior in nanoscale titanium oxide films. Through a high-resolution transmission electron microscopy, an analytical TEM technique using energy-filtering transmission electron microscopy and an in situ x-ray photoelectron spectroscopy, we demonstrated that the Oxygen Ions piled up at top interface by an oxidation-reduction reaction between the titanium oxide layer and the top Al metal electrode. We also found that the drift of Oxygen Ions during the on/off switching induced the bipolar resistive switching in the titanium oxide thin films.
