| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Kostritskii, S. M. | - |
| dc.contributor.author | Aillerie, M. | - |
| dc.contributor.author | Bourson, P. | - |
| dc.contributor.author | Kip, Detlef | - |
| dc.date.accessioned | 2021-12-28T09:08:52Z | - |
| dc.date.available | 2021-12-28T09:08:52Z | - |
| dc.date.issued | 2009-04 | - |
| dc.identifier.issn | 0946-2171 | - |
| dc.description.abstract | Raman spectra of LiTaO3 single crystals with various stoichiometries were measured to investigate the compositional uniformity of these crystals. Raman spectra mapping demonstrates a spatial variation of the widths of the phonon bands for stoichiometric, congruent, and quasi-congruent samples. A significant radial compositional inhomogeneity is found to be a common feature of commercially available wafers having a near-congruent crystal composition (i.e., x c ={[Li2O]/([Li2O] +[Ta2O5])}×100%=47.85-48.50%) grown by the single-crucible Czochralski method. A maximum value of the composition gradient x c for a radial inhomogeneity of 0.163 and 0.036%/cm is measured for thin wafers diced from so-called congruent (vendors' value of Δx c =48.50%) and quasi-congruent (x c =47.88%) crystals, respectively. In crystals grown from highly Li-rich melts (starting composition 54.5 mol% Li2O), a drastic spatial dependence of Raman bandwidths, indicating a significant gradual compositional inhomogeneity throughout the crystal, is found, which is due to a change of the melt composition during crystal growth. In contrast, the Raman bandwidths of near-stoichiometric crystals fabricated by a vapor transport equilibrium (VTE) technique are found to be constant, i.e. these crystals are practically compositionally uniform. This conclusion has been confirmed by mapping the photoluminescence intensity, evidencing Δ x c≤0.006%/cm in near-stoichiometric VTE-treated crystals. © 2009 Springer-Verlag. | - |
| dc.description.sponsorship | Technische Universität Clausthal | - |
| dc.language.iso | eng | - |
| dc.publisher | Springer | - |
| dc.relation.ispartof | Applied Physics B Lasers and optics | - |
| dc.title | Raman spectroscopy study of compositional inhomogeneity in lithium tantalate crystals | - |
| dc.type | Article | - |
| dc.identifier.doi | 10.1007/s00340-009-3442-y | - |
| dc.identifier.scopus | 2-s2.0-62949201108 | - |
| dcterms.bibliographicCitation.volume | 95 | - |
| dcterms.bibliographicCitation.pagestart | 125 | - |
| dcterms.bibliographicCitation.pageend | 130 | - |
| dcterms.bibliographicCitation.originalpublisherplace | Berlin | - |
| local.submission.type | only-metadata | - |
| item.grantfulltext | none | - |
| item.languageiso639-1 | en | - |
| item.fulltext_s | No Fulltext | - |
| item.openairetype | Article | - |
| item.fulltext | No Fulltext | - |
| crisitem.author.dept | Experimentalphysik und Materialwissenschaften | - |
| crisitem.author.orcid | 0000-0001-7923-0113 | - |
| crisitem.author.parentorg | Fakultät für Elektrotechnik | - |
| Appears in Collections: | 6 - Publication references (without fulltext) of your publications before HSU | |
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