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Electrically controlled transformation of memristive titanates into mesoporous titanium oxides via incongruent sublimation
Perovskites such as SrTiO(3), BaTiO(3), and CaTiO(3) have become key materials for future energy-efficient memristive data storage and logic applications due to their ability to switch their resistance reversibly upon application of an external voltage. This resistance switching effect is based on t...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5830621/ https://www.ncbi.nlm.nih.gov/pubmed/29491379 http://dx.doi.org/10.1038/s41598-018-22238-4 |
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author | Rodenbücher, C. Meuffels, P. Bihlmayer, G. Speier, W. Du, H. Schwedt, A. Breuer, U. Jia, C.-L. Mayer, J. Waser, R. Szot, K. |
author_facet | Rodenbücher, C. Meuffels, P. Bihlmayer, G. Speier, W. Du, H. Schwedt, A. Breuer, U. Jia, C.-L. Mayer, J. Waser, R. Szot, K. |
author_sort | Rodenbücher, C. |
collection | PubMed |
description | Perovskites such as SrTiO(3), BaTiO(3), and CaTiO(3) have become key materials for future energy-efficient memristive data storage and logic applications due to their ability to switch their resistance reversibly upon application of an external voltage. This resistance switching effect is based on the evolution of nanoscale conducting filaments with different stoichiometry and structure than the original oxide. In order to design and optimize memristive devices, a fundamental understanding of the interaction between electrochemical stress, stoichiometry changes and phase transformations is needed. Here, we follow the approach of investigating these effects in a macroscopic model system. We show that by applying a DC voltage under reducing conditions on a perovskite slab it is possible to induce stoichiometry polarization allowing for a controlled decomposition related to incongruent sublimation of the alkaline earth metal starting in the surface region. This way, self-formed mesoporous layers can be generated which are fully depleted by Sr (or Ba, Ca) but consist of titanium oxides including TiO and Ti(3)O with tens of micrometre thickness. This illustrates that phase transformations can be induced easily by electrochemical driving forces. |
format | Online Article Text |
id | pubmed-5830621 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-58306212018-03-05 Electrically controlled transformation of memristive titanates into mesoporous titanium oxides via incongruent sublimation Rodenbücher, C. Meuffels, P. Bihlmayer, G. Speier, W. Du, H. Schwedt, A. Breuer, U. Jia, C.-L. Mayer, J. Waser, R. Szot, K. Sci Rep Article Perovskites such as SrTiO(3), BaTiO(3), and CaTiO(3) have become key materials for future energy-efficient memristive data storage and logic applications due to their ability to switch their resistance reversibly upon application of an external voltage. This resistance switching effect is based on the evolution of nanoscale conducting filaments with different stoichiometry and structure than the original oxide. In order to design and optimize memristive devices, a fundamental understanding of the interaction between electrochemical stress, stoichiometry changes and phase transformations is needed. Here, we follow the approach of investigating these effects in a macroscopic model system. We show that by applying a DC voltage under reducing conditions on a perovskite slab it is possible to induce stoichiometry polarization allowing for a controlled decomposition related to incongruent sublimation of the alkaline earth metal starting in the surface region. This way, self-formed mesoporous layers can be generated which are fully depleted by Sr (or Ba, Ca) but consist of titanium oxides including TiO and Ti(3)O with tens of micrometre thickness. This illustrates that phase transformations can be induced easily by electrochemical driving forces. Nature Publishing Group UK 2018-02-28 /pmc/articles/PMC5830621/ /pubmed/29491379 http://dx.doi.org/10.1038/s41598-018-22238-4 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Rodenbücher, C. Meuffels, P. Bihlmayer, G. Speier, W. Du, H. Schwedt, A. Breuer, U. Jia, C.-L. Mayer, J. Waser, R. Szot, K. Electrically controlled transformation of memristive titanates into mesoporous titanium oxides via incongruent sublimation |
title | Electrically controlled transformation of memristive titanates into mesoporous titanium oxides via incongruent sublimation |
title_full | Electrically controlled transformation of memristive titanates into mesoporous titanium oxides via incongruent sublimation |
title_fullStr | Electrically controlled transformation of memristive titanates into mesoporous titanium oxides via incongruent sublimation |
title_full_unstemmed | Electrically controlled transformation of memristive titanates into mesoporous titanium oxides via incongruent sublimation |
title_short | Electrically controlled transformation of memristive titanates into mesoporous titanium oxides via incongruent sublimation |
title_sort | electrically controlled transformation of memristive titanates into mesoporous titanium oxides via incongruent sublimation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5830621/ https://www.ncbi.nlm.nih.gov/pubmed/29491379 http://dx.doi.org/10.1038/s41598-018-22238-4 |
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