Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 조윌렴 | * |
dc.date.accessioned | 2016-08-28T10:08:23Z | - |
dc.date.available | 2016-08-28T10:08:23Z | - |
dc.date.issued | 2013 | * |
dc.identifier.issn | 2046-2069 | * |
dc.identifier.other | OAK-9712 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/223389 | - |
dc.description.abstract | Room-temperature dielectric function ε = ε1 + iε2 spectra of magnetoelectric Ga2-xFe xO3 (x = 0.9, 1.0, and 1.4) thin films are determined by spectroscopic ellipsometry (SE) as a function of Fe concentration x. The SE data are analysed by a multilayer model with a series of Tauc-Lorentz oscillators. While the threshold energies slightly decrease as x increases, the oscillator strength shows a strong composition-dependence for the major optical structure at ∼3.5 eV. The experimental data are compared to the ε spectra obtained by density functional theory (DFT) calculations. Even though the overall shape of ε spectra is consistent, the experimental data and calculated spectra show a clear discrepancy in the oscillator's strength ratio of the two optical structures at ∼3.5 and ∼6.0 eV. The DFT calculations suggest that a significant disordering in the cationic (Ga and Fe) sites in Ga2-xFexO3 is present in thin films, which influences their optical properties. This work demonstrates a successful application of optical characterization for determining the cationic sites occupation in thin films, which in turn improves our understanding of Physics and Chemistry in Ga2-xFexO3 thin films and paves a pathway to the development of new multifunctional devices. © 2013 The Royal Society of Chemistry. | * |
dc.language | English | * |
dc.title | Effects of iron concentration and cationic site disorder on the optical properties of magnetoelectric gallium ferrite thin films | * |
dc.type | Article | * |
dc.relation.issue | 9 | * |
dc.relation.volume | 3 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 3124 | * |
dc.relation.lastpage | 3130 | * |
dc.relation.journaltitle | RSC Advances | * |
dc.identifier.doi | 10.1039/c2ra22681b | * |
dc.identifier.wosid | WOS:000314475700034 | * |
dc.identifier.scopusid | 2-s2.0-84874402395 | * |
dc.author.google | Thomasson A. | * |
dc.author.google | Ibrahim F. | * |
dc.author.google | Lefevre C. | * |
dc.author.google | Autissier E. | * |
dc.author.google | Roulland F. | * |
dc.author.google | Meny C. | * |
dc.author.google | Leuvrey C. | * |
dc.author.google | Choi S. | * |
dc.author.google | Jo W. | * |
dc.author.google | Cregut O. | * |
dc.author.google | Versini G. | * |
dc.author.google | Barre S. | * |
dc.author.google | Alouani M. | * |
dc.author.google | Viart N. | * |
dc.contributor.scopusid | 조윌렴(7103322276) | * |
dc.date.modifydate | 20240123091004 | * |