Luminescence properties of rare earth ions in polytantalate

Shun Ichi Kubota, Hiasanori Yamane, Masahiko Shimada, Hirotsugu Takizawa, Tadashi Endo

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The luminescence properties of R3+ (R3+=Eu3+, Tb3+, Tm3+) in La1-xRxTa7O19 solid solution were systematically examined. In this host lattice, the distance between nearest neighbors of the La3+ site which were substituted by the R3+ ions, were very long (about 0.62 nm) and the sites locate two-dimensionally. The critical concentration at which the concentration quenching occurred under UV excitation were x=1.0 in La1-xEuxTa7O19, x=0.9 in La1-xTbxTa7O19 and x=0.14 in La1-xTmxTa7O19. Furthermore the energy migration process of these samples were investigated.

Original languageEnglish
Pages (from-to)746-749
Number of pages4
JournalJournal of Alloys and Compounds
Volume275-277
DOIs
Publication statusPublished - 1998 Jul 24

Keywords

  • Energy migration
  • Luminescence
  • Rare earth
  • Tantalate

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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