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http://hdl.handle.net/10773/6248
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DC Field | Value | Language |
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dc.contributor.author | Alves, E. | pt |
dc.contributor.author | Silva, M.F. | pt |
dc.contributor.author | Soares, J.C. | pt |
dc.contributor.author | Monteiro, T. | pt |
dc.contributor.author | Soares, J. | pt |
dc.contributor.author | Santos, L. | pt |
dc.date.accessioned | 2012-02-11T14:56:54Z | - |
dc.date.issued | 2000 | - |
dc.identifier.issn | 0168-583X | pt |
dc.identifier.uri | http://hdl.handle.net/10773/6248 | - |
dc.description.abstract | Defect production and optical activity of Er-implanted α-Al2O3 were studied as a function of implanted dose and crystal orientation. Erbium fluences in the range of 8×1013–4×1015 Er+/cm2 were implanted into single crystalline samples with either the m-axis or c-axis normal to the surface. The energy of the Er ions was 200 keV. We found that the number of displaced O atoms was about two times higher on samples with the c-axis normal to the surface compared to the m-samples. The annealing stages of the damage follow a similar behaviour for the m-axis and c-axis samples and the complete recovery occurs for temperatures above 1200°C. The reconstruction of the lattice is accompanied by a reduction in the intensity of the photoluminescence signal above 825°C. Since the amount of Er and its lattice site is maintained, it is concluded that the change on its surroundings was responsible for the decrease of optical activity. | pt |
dc.description.sponsorship | Praxis XXI | pt |
dc.description.sponsorship | C/CTM/12067/1998 | pt |
dc.language.iso | eng | pt |
dc.publisher | Elsevier | pt |
dc.relation.uri | http://www.scopus.com/inward/record.url?eid=2-s2.0-0033737872&partnerID=40&md5=372a35007dffb40ac9f5232a1cfa1534 | |
dc.rights | restrictedAccess | por |
dc.subject | Defect anisotrophy | pt |
dc.subject | Optical doping | pt |
dc.subject | Photoluminescence | pt |
dc.title | Effect of crystal orientation on defect production and optical activation of Er-implanted sapphire | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 183 | pt |
degois.publication.lastPage | 187 | pt |
degois.publication.title | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | pt |
degois.publication.volume | 166 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.identifier.doi | 10.1016/S0168-583X(99)00652-7 | * |
Appears in Collections: | DFis - Artigos |
Files in This Item:
File | Description | Size | Format | |
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NIMB.pdf | versão pdf do editor | 173.93 kB | Adobe PDF |
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