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Use of polarized optical absorption to obtain structural information for Na1/Nd31 b9-alumina
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
1996 (English)In: Physical Review B, Condensed matter, ISSN 0163-1829, Vol. 54, no 24, 17476-17 485 p.Article in journal (Refereed) Published
Abstract [en]

Part of the optical absorption spectrum is calculated for the Nd31-doped Na1 b9-alumina using a moleculardynamics-~MD! based approach. The Judd/Ofelt ~J/O! theory is modified ~and several approximations removed! to treat polarized transition intensities for rare-earth ions in a solid host. Stark-level energies and eigenfunctions of the ground state ~4I9/2! and excited multiplets (4F3/2,2P1/2) are also calculated for the local environments involved. Energies and polarized transition intensities between individual Stark levels are thus calculated simultaneously for several hundreds of MD-generated environments; summation gives the total bandshape. A high proportion of Beevers-Ross-site occupation ~.50%! is indicated for low Nd31 concentrations in b9-alumina. The contrary is observed experimentally for high Nd31 concentrations, i.e., then midoxygen site occupation dominates. It is demonstrated that ions in different local environments contribute differently to the absorption spectrum and, particularly, how the polarization of the various transitions changes for ions occupying different sites. Temperature dependence aspects are also considered

Place, publisher, year, edition, pages
1996. Vol. 54, no 24, 17476-17 485 p.
Keyword [en]
absorption, rare earth
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-2693DOI: 10.1103/PhysRevB.54.17476ISI: A1996WD55300040Local ID: 2127OAI: oai:DiVA.org:miun-2693DiVA: diva2:27725
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-01-10Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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