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EELS Analysis of Oxygen Scavenging Effect in a Resistive Switching Structure of Pt/Ta/SrTiO3/Pt

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/72301

Title: EELS Analysis of Oxygen Scavenging Effect in a Resistive Switching Structure of Pt/Ta/SrTiO3/Pt
Authors: Tsurumaki-Fukuchi, Atsushi Browse this author
Nakagawa, Ryosuke Browse this author
Arita, Masashi Browse this author →KAKEN DB
Takahashi, Yasuo Browse this author →KAKEN DB
Issue Date: 2018
Publisher: Cambridge University Press
Journal Title: MRS Advances
Volume: 3
Issue: 33
Start Page: 1925
End Page: 1930
Publisher DOI: 10.1557/adv.2018.12
Abstract: A complex mechanism of interfacial oxygen scavenging is revealed by electron energy-loss spectroscopy (EELS) for a resistive switching oxide of SrTiO3 with a scavenging layer of Ta. When Ta thin layer is inserted at one of the interfaces of Pt/SrTiO3/Pt structure, a large reduction of electrical resistance is induced for the structure, and oxygen defects are introduced at the interfacial part of SrTiO3. In the resistance decrease by voltage applications, simultaneous occurrence of oxidation and reduction of Ta scavenging layer is shown by EELS analyses from the low-loss spectra. The EELS and scanning transmission electron microscopy observations demonstrate that oxygen scavenging by Ta layer is an interfacial phenomenon where the redox reactions occur at the whole part of the interface. In addition, Pt electrode of the structure, which is chemically inert for oxidation, is revealed to have significant effects in the scavenging processes.
Rights: This article has been published in a revised form in MRS Advances, https://doi.org/10.1557/adv.2018.12. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © copyright holder.
Type: article (author version)
URI: http://hdl.handle.net/2115/72301
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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