Crystal growth and characterization of Tm doped mixed rare-earth aluminum perovskite

Daisuke Totsuka, Takayuki Yanagida, Makoto Sugiyama, Yutaka Fujimoto, Yuui Yokota, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


In this work, we present results of structural characterization and optical properties including radio luminescence of (Lu xGd yY 0.99-x-yTm 0.01)AP single crystal scintillators for (x, y) = (0.30, 0.19), (0, 0.19) and (0, 0) grown by the micro-pulling-down (μ-PD) method. The grown crystals were single phase materials with perovskite structure (Pbnm) as confirmed by XRD and had a good crystallinity. The distribution of the crystal constituents in growth direction was evaluated, and significant segregation of Lu and Gd was detected in (Lu 0.30Gd 0.19Y 0.50Tm 0.01)AP sample. The crystals demonstrated 70% transmittance in visible wavelength range and some absorption bands due to Tm 3+, Gd 3+ and color centers were exhibited in 190-900 nm. The radioluminescence measurement under X-ray irradiation demonstrated several emission peaks ascribed to 4f-4f transitions of Tm 3+ and Gd 3+. The ratio of emission intensity in longer wavelength range was increased when Y was replaced by Lu or Gd.

Original languageEnglish
Pages (from-to)993-997
Number of pages5
JournalMaterials Research Bulletin
Issue number4
Publication statusPublished - 2012 Apr


  • Electron microscopy
  • Luminescence
  • Oxides
  • X-ray diffraction


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