ProtonationDriven Polarization Retention Failure in Nano-Columnar Lead-Free Ferroelectric Thin Films
DC Field | Value | Language |
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dc.contributor.author | Sheeraz, Muhammad | - |
dc.contributor.author | Ahn, Chang Won | - |
dc.contributor.author | Duong, Nguyen Xuan | - |
dc.contributor.author | Hwang, Soo-Yoon | - |
dc.contributor.author | Jang, Ji-Soo | - |
dc.contributor.author | Kim, Eun-Young | - |
dc.contributor.author | Kim, Yoon Ki | - |
dc.contributor.author | Lee, Jaeyeong | - |
dc.contributor.author | Jin, Jong Sung | - |
dc.contributor.author | Bae, Jong-Seong | - |
dc.contributor.author | Lee, Myang Hwan | - |
dc.contributor.author | Han, Hyoung-Su | - |
dc.contributor.author | Kim, Gi-Yeop | - |
dc.contributor.author | Cho, Shinuk | - |
dc.contributor.author | Song, Tae Kwon | - |
dc.contributor.author | Yang, Sang Mo | - |
dc.contributor.author | Bu, Sang Don | - |
dc.contributor.author | Baek, Seung-Hyub | - |
dc.contributor.author | Si-Young Choi | - |
dc.contributor.author | Kim, Ill Won | - |
dc.contributor.author | Kim, Tae Heon | - |
dc.date.accessioned | 2024-12-30T02:00:08Z | - |
dc.date.available | 2024-12-30T02:00:08Z | - |
dc.date.created | 2024-11-15 | - |
dc.date.issued | 2024-12 | - |
dc.identifier.uri | https://pr.ibs.re.kr/handle/8788114/16002 | - |
dc.description.abstract | Understanding microscopic mechanisms of polarization retention characteristics in ferroelectric thin films is of great significance for exploring unusual physical phenomena inaccessible in the bulk counterparts and for realizing thin-film-based functional electronic devices. Perovskite (K,Na)NbO3 is an excellent class of lead-free ferroelectric oxides attracting tremendous interest thanks to its potential applications to nonvolatile memory and eco-friendly energy harvester/storage. Nonetheless, in-depth investigation of ferroelectric properties of (K,Na)NbO3 films and the following developments of nano-devices are limited due to challenging thin-film fabrication associated with nonstoichiometry by volatile K and Na atoms. Herein, ferroelectric (K,Na)NbO3 films of which the atomic-level geometrical structures strongly depend on thickness-dependent strain relaxation are epitaxially grown. Nanopillar crystal structures are identified in fully relaxed (K,Na)NbO3 films to the bulk states representing a continuous reduction of switchable polarization under air environments, that is, polarization retention failures. Protonation by water dissociation is responsible for the humidity-induced retention loss in nano-columnar (K,Na)NbO3 films. The protonation-driven polarization retention failure originates from domain wall pinning by the accumulation of mobile hydrogen ions at charged domain walls for effective screening of polarization-bound charges. Conceptually, the results will be utilized for rational design to advanced energy materials such as photo-catalysts enabling ferroelectric tuning of water splitting. © 2024 The Author(s). Advanced Science published by Wiley-VCH GmbH. | - |
dc.language | 영어 | - |
dc.publisher | Wiley-VCH Verlag | - |
dc.title | ProtonationDriven Polarization Retention Failure in Nano-Columnar Lead-Free Ferroelectric Thin Films | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.identifier.wosid | 001358427200001 | - |
dc.identifier.scopusid | 2-s2.0-85207858549 | - |
dc.identifier.rimsid | 84438 | - |
dc.contributor.affiliatedAuthor | Si-Young Choi | - |
dc.identifier.doi | 10.1002/advs.202408784 | - |
dc.identifier.bibliographicCitation | Advanced Science, v.11, no.48 | - |
dc.relation.isPartOf | Advanced Science | - |
dc.citation.title | Advanced Science | - |
dc.citation.volume | 11 | - |
dc.citation.number | 48 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | Y | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordAuthor | polarization retention loss | - |
dc.subject.keywordAuthor | thin film | - |
dc.subject.keywordAuthor | (K,Na)NbO<sub>3</sub> | - |
dc.subject.keywordAuthor | epitaxy | - |
dc.subject.keywordAuthor | ferroelectric | - |