Zobrazeno 1 - 9
of 9
pro vyhledávání: '"L. A. Momoda"'
Publikováno v:
Journal of Physics and Chemistry of Solids. 53:1175-1184
The polarized absorption spectra and intensities of trivalent erbium in sodium beta-doubleprime alumina (Er:SBA) were investigated between 355 nm and 850 nm. Both sigma ( E ⊥ c -axis) and pi ( E ∥ c -axis) polarized intensity parameters were obta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df2e82489d9878a91327429065ded76f
https://doi.org/10.1016/0022-3697(92)90036-d
https://doi.org/10.1016/0022-3697(92)90036-d
Autor:
Bruce Dunn, L. A. Momoda
Publikováno v:
J. Mater. Chem.. 2:295-301
A two-step reduction ion-exchange technique is used to synthesize stable β″-alumina single crystals containing Yb2+ and Sm2+ ions. The luminescent properties of these materials are discussed. Yb2+ and Sm2+: β″-aluminas both exhibit parity-allow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15f06963d35f0aea75c5cc40a935d892
https://doi.org/10.1039/jm9920200295
https://doi.org/10.1039/jm9920200295
Publikováno v:
J. Mater. Chem.. 2:93-97
Ho3+-doped β″-aluminas have been prepared over a wide range of concentrations by the ion-exchange method. The absorption, emission and excitation spectra of these materials have been determined in combination with fluorescence lifetime measurement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2736ba277fcc911ce05d498ab75860ae
https://doi.org/10.1039/jm9920200093
https://doi.org/10.1039/jm9920200093
Publikováno v:
Journal de Physique IV Proceedings
Journal de Physique IV Proceedings, EDP Sciences, 1991, 01 (C7), pp.C7-411-C7-414. ⟨10.1051/jp4:19917105⟩
Journal de Physique IV Proceedings, EDP Sciences, 1991, 01 (C7), pp.C7-411-C7-414. ⟨10.1051/jp4:19917105⟩
Beta"-alumina crystals containing mixed Yb3+-RE3+(RE3+=Er3+,Ho3+,Tm3+) pairs are synthesized by ion exchange techniques. Under a 970 nm excitation from a C.W. Ti-sapphire laser, a fluorescence is observed in the visible range with the three codoped s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3664f0b053cf44482a6b31f5f9975e1b
https://doi.org/10.1051/jp4:19917105
https://doi.org/10.1051/jp4:19917105
Publikováno v:
Journal of Solid State Chemistry. 86:94-100
ESR and optical absorption spectroscopy are reported for Ce 3+ doped β″-alumina and codoped Ce 3+ Nd 3+ -β″-alumina. The doping was achieved by ion exchange techniques. The spectra indicate that the Ce 3+ ions are found at the mid-oxygen sit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d9b6ea20cf3ac03257092d0c02075a7
https://doi.org/10.1016/0022-4596(90)90118-h
https://doi.org/10.1016/0022-4596(90)90118-h
Autor:
L. A. Momoda, L. M. dos Santos, D. A. Young, J. Sytsma, J. P. M. van Vliet, Teresa Monteiro, G. F. Imbusch, X. X. Zhang, Andries Meijerink, D. Oberhauser, S. Jain, A. Uhrig, G. E. Giakoumakis, S. Albin, Ö. Pekcan, K. C. Mishra, M. Grün, C. J. Donnelly, D. B. Hollis, S. E. Sarkisov, R. Raue, M. Minella, H. C. G. Verhaar, H. von Seggern, H. Schwab, R. Chapoulie
Publikováno v:
Advances in Nonradiative Processes in Solids ISBN: 9781441932198
Optimal transitions between the 5D4 excited state of the Tb3+ (4f)8 configuration and the crystal field splitted components of the (4f)85d configuration have been observed using high-resolution laser excitation of Tb-doped powder samples. The Excited
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c27010d8f07799b9d9c3bf29bacff183
https://doi.org/10.1007/978-1-4757-4446-0_23
https://doi.org/10.1007/978-1-4757-4446-0_23
Publikováno v:
Materials Research Bulletin. 24:859-866
The preparation of single crystals of Beta -alumina containing two trivalent lanthanide species is described. The use of eutectic melts enables the two rare earth species to be introduced during a single ion exchange process. Energy transfer in cryst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b0a49d474c72e5d343b363707ee22a7
https://doi.org/10.1016/0025-5408(89)90049-4
https://doi.org/10.1016/0025-5408(89)90049-4
Energy transfer between cerium (+3) and neodynium (+3) exchanged into beta -alumina is observed. Synthesis of the crystals was achieved by ion exchange. Both radiative and nonradiative transfer mechanisms are evident. The nonradiative transfer is att
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0903a920e8f8b9500e9cbb49b3b15661
https://doi.org/10.21236/ada209818
https://doi.org/10.21236/ada209818