Anomalous low-energy phonons in nearly tetragonal BiFeO3 thin films
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, K. -Y. | - |
dc.contributor.author | Do, S. H. | - |
dc.contributor.author | Lemmens, P. | - |
dc.contributor.author | Wulferding, D. | - |
dc.contributor.author | Woo, C. S. | - |
dc.contributor.author | Lee, J. H. | - |
dc.contributor.author | Chu, K. | - |
dc.contributor.author | Yang, C. -H. | - |
dc.date.available | 2019-05-29T11:32:59Z | - |
dc.date.issued | 2011-10 | - |
dc.identifier.issn | 1098-0121 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/21173 | - |
dc.description.abstract | We present evidence for a concomitant structural and ferroelectric transformation around T-S similar to 360 K in multiferroic BiFeO3/LaAlO3 thin films close to the tetragonal phase. Phonon excitations are investigated by using Raman scattering as a function of temperature. The low-energy phonon modes at 180-260 cm(-1) related to the FeO6 octahedron tilting show anomalous behaviors upon cooling through T-S: (i) a large hardening amounting to 15 cm(-1), (ii) an increase of intensity by one order of magnitude, and (iii) an appearance of a dozen new modes. In contrast, the high-frequency modes exhibit only weak anomalies. This suggests an intimate coupling of octahedron tilting to ferroelectricity leading to a simultaneous change of structural and ferroelectric properties. | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | AMER PHYSICAL SOC | - |
dc.title | Anomalous low-energy phonons in nearly tetragonal BiFeO3 thin films | - |
dc.type | Article | - |
dc.identifier.doi | 10.1103/PhysRevB.84.132408 | - |
dc.identifier.bibliographicCitation | PHYSICAL REVIEW B, v.84, no.13 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.wosid | 000295869600001 | - |
dc.identifier.scopusid | 2-s2.0-80155206209 | - |
dc.citation.number | 13 | - |
dc.citation.title | PHYSICAL REVIEW B | - |
dc.citation.volume | 84 | - |
dc.type.docType | Article | - |
dc.publisher.location | 미국 | - |
dc.subject.keywordPlus | PHASE | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.relation.journalWebOfScienceCategory | Physics, Condensed Matter | - |
dc.description.journalRegisteredClass | sci | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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