Dislocations Accelerate Oxygen Ion Diffusion in La[subscript 0.8]Sr[subscript 0.2]MnO[subscript 3] Epitaxial Thin Films
Revealing whether dislocations accelerate oxygen ion transport is important for providing abilities in tuning the ionic conductivity of ceramic materials. In this study, we report how dislocations affect oxygen ion diffusion in Sr-doped LaMnO3(LSM), a model perovskite oxide that serves in energy con...
| Main Authors: | , , , , , , , , , , |
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American Chemical Society (ACS)
2018
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| Online Access: | http://hdl.handle.net/1721.1/117130 https://orcid.org/0000-0001-6063-023X https://orcid.org/0000-0002-2688-5666 |
| _version_ | 1826201591722541056 |
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| author | Navickas, Edvinas Lu, Qiyang Wallisch, Wolfgang Bernardi, Johannes Stöger-Pollach, Michael Friedbacher, Gernot Hutter, Herbert Fleig, Jürgen Chen, Yan Huber, Tobias Yildiz, Bilge |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Navickas, Edvinas Lu, Qiyang Wallisch, Wolfgang Bernardi, Johannes Stöger-Pollach, Michael Friedbacher, Gernot Hutter, Herbert Fleig, Jürgen Chen, Yan Huber, Tobias Yildiz, Bilge |
| author_sort | Navickas, Edvinas |
| collection | MIT |
| description | Revealing whether dislocations accelerate oxygen ion transport is important for providing abilities in tuning the ionic conductivity of ceramic materials. In this study, we report how dislocations affect oxygen ion diffusion in Sr-doped LaMnO3(LSM), a model perovskite oxide that serves in energy conversion technologies. LSM epitaxial thin films with thicknesses ranging from 10 nm to more than 100 nm were prepared by pulsed laser deposition on single-crystal LaAlO3and SrTiO3substrates. The lattice mismatch between the film and substrates induces compressive or tensile in-plane strain in the LSM layers. This lattice strain is partially reduced by dislocations, especially in the LSM films on LaAlO3. Oxygen isotope exchange measured by secondary ion mass spectrometry revealed the existence of at least two very different diffusion coefficients in the LSM films on LaAlO3. The diffusion profiles can be quantitatively explained by the existence of fast oxygen ion diffusion along threading dislocations that is faster by up to 3 orders of magnitude compared to that in LSM bulk. Keywords: (La,Sr)MnO[subscript 3]; dislocation; epitaxial thin film; oxygen diffusion; oxygen surface exchange; strain; ToF-SIMS |
| first_indexed | 2024-09-23T11:54:09Z |
| format | Article |
| id | mit-1721.1/117130 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T11:54:09Z |
| publishDate | 2018 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/1171302022-09-27T22:42:45Z Dislocations Accelerate Oxygen Ion Diffusion in La[subscript 0.8]Sr[subscript 0.2]MnO[subscript 3] Epitaxial Thin Films Navickas, Edvinas Lu, Qiyang Wallisch, Wolfgang Bernardi, Johannes Stöger-Pollach, Michael Friedbacher, Gernot Hutter, Herbert Fleig, Jürgen Chen, Yan Huber, Tobias Yildiz, Bilge Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Chen, Yan Huber, Tobias Yildiz, Bilge Revealing whether dislocations accelerate oxygen ion transport is important for providing abilities in tuning the ionic conductivity of ceramic materials. In this study, we report how dislocations affect oxygen ion diffusion in Sr-doped LaMnO3(LSM), a model perovskite oxide that serves in energy conversion technologies. LSM epitaxial thin films with thicknesses ranging from 10 nm to more than 100 nm were prepared by pulsed laser deposition on single-crystal LaAlO3and SrTiO3substrates. The lattice mismatch between the film and substrates induces compressive or tensile in-plane strain in the LSM layers. This lattice strain is partially reduced by dislocations, especially in the LSM films on LaAlO3. Oxygen isotope exchange measured by secondary ion mass spectrometry revealed the existence of at least two very different diffusion coefficients in the LSM films on LaAlO3. The diffusion profiles can be quantitatively explained by the existence of fast oxygen ion diffusion along threading dislocations that is faster by up to 3 orders of magnitude compared to that in LSM bulk. Keywords: (La,Sr)MnO[subscript 3]; dislocation; epitaxial thin film; oxygen diffusion; oxygen surface exchange; strain; ToF-SIMS United States. Department of Energy (Grant DE-SC0002633) 2018-07-26T13:41:38Z 2018-07-26T13:41:38Z 2017-10 2017-09 2018-07-23T13:15:10Z Article http://purl.org/eprint/type/JournalArticle 1936-0851 1936-086X http://hdl.handle.net/1721.1/117130 Navickas, Edvinas et al. “Dislocations Accelerate Oxygen Ion Diffusion in La[subscript 0.8]Sr[subscript 0.2]MnO[subscript 3] Epitaxial Thin Films.” ACS Nano 11, 11 (October 2017): 11475–11487 © 2017 American Chemical Society https://orcid.org/0000-0001-6063-023X https://orcid.org/0000-0002-2688-5666 http://dx.doi.org/10.1021/ACSNANO.7B06228 ACS Nano Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society (ACS) ACS |
| spellingShingle | Navickas, Edvinas Lu, Qiyang Wallisch, Wolfgang Bernardi, Johannes Stöger-Pollach, Michael Friedbacher, Gernot Hutter, Herbert Fleig, Jürgen Chen, Yan Huber, Tobias Yildiz, Bilge Dislocations Accelerate Oxygen Ion Diffusion in La[subscript 0.8]Sr[subscript 0.2]MnO[subscript 3] Epitaxial Thin Films |
| title | Dislocations Accelerate Oxygen Ion Diffusion in La[subscript 0.8]Sr[subscript 0.2]MnO[subscript 3] Epitaxial Thin Films |
| title_full | Dislocations Accelerate Oxygen Ion Diffusion in La[subscript 0.8]Sr[subscript 0.2]MnO[subscript 3] Epitaxial Thin Films |
| title_fullStr | Dislocations Accelerate Oxygen Ion Diffusion in La[subscript 0.8]Sr[subscript 0.2]MnO[subscript 3] Epitaxial Thin Films |
| title_full_unstemmed | Dislocations Accelerate Oxygen Ion Diffusion in La[subscript 0.8]Sr[subscript 0.2]MnO[subscript 3] Epitaxial Thin Films |
| title_short | Dislocations Accelerate Oxygen Ion Diffusion in La[subscript 0.8]Sr[subscript 0.2]MnO[subscript 3] Epitaxial Thin Films |
| title_sort | dislocations accelerate oxygen ion diffusion in la subscript 0 8 sr subscript 0 2 mno subscript 3 epitaxial thin films |
| url | http://hdl.handle.net/1721.1/117130 https://orcid.org/0000-0001-6063-023X https://orcid.org/0000-0002-2688-5666 |
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