Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 양인상 | - |
dc.date.accessioned | 2016-08-28T11:08:39Z | - |
dc.date.available | 2016-08-28T11:08:39Z | - |
dc.date.issued | 1993 | - |
dc.identifier.issn | 0721-7250 | - |
dc.identifier.other | OAK-12959 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/229015 | - |
dc.description.abstract | We report effects of heating to the intensities of Raman modes in the spectra of single-crystals embedded in ceramic YBa2Cu3O7-δ pellets, and compare the results with those from YBa2Cu3O7-δ thin-films. Heating was done by either increasing the laser-beam power or resistively heating in a heating cell. From the measurements on a single-crystal in z(xx) {Mathematical expression} polarization, we find that the relative intensity of the B1 g mode of the plane oxygens to that of the A1 g mode of apical oxygens decreases strongly as the samples are heated. For a crystal in near x(zz) {Mathematical expression} polarization, the relative intensity of the two modes increases up to certain value. In thin-films, however, no such change was observed even when heated to higher temperatures than the crystals were. Therefore, we interpret that the change in the relative intensity of the two modes of single-crystals is not due to electronic or structural changes nor thermal decomposition in the heated samples. We propose that a single-crystal, when heated, is fractured into many "micro-crystals" and these micro-crystals thermally fluctuate in orientations. For thin-films, such fluctuation in orientations might be hindered because there are only a few layers of micro-crystals on top of the substrate. Scanning electron micrographs (SEM) of the heated part of the samples seem to provide the evidence of the micro-crystals. © 1993 Springer-Verlag. | - |
dc.language | English | - |
dc.publisher | Springer-Verlag | - |
dc.title | Effects of heating on the Raman spectra of YBa2Cu3O7-δ | - |
dc.type | Article | - |
dc.relation.issue | 6 | - |
dc.relation.volume | 57 | - |
dc.relation.index | SCOPUS | - |
dc.relation.startpage | 533 | - |
dc.relation.lastpage | 538 | - |
dc.relation.journaltitle | Applied Physics A Solids and Surfaces | - |
dc.identifier.doi | 10.1007/BF00331754 | - |
dc.identifier.scopusid | 2-s2.0-34250079627 | - |
dc.author.google | Yang I.-S. | - |
dc.author.google | Khim Z.G. | - |
dc.contributor.scopusid | 양인상(7101797839) | - |
dc.date.modifydate | 20230210140835 | - |