TY - JOUR
T1 - Crystal growth and characterization of Tm doped mixed rare-earth aluminum perovskite
AU - Totsuka, Daisuke
AU - Yanagida, Takayuki
AU - Sugiyama, Makoto
AU - Fujimoto, Yutaka
AU - Yokota, Yuui
AU - Yoshikawa, Akira
N1 - Funding Information:
This work was mainly supported by JST Sentan and partially by a Grant in Aid for Young Scientists (B)- 15686001 , (A)- 23686135 , and Challenging Exploratory Research-23656584 from the Ministry of Education, Culture, Sports, Science and Technology of the Japanese government (MEXT). Partial assistance from the Yazaki Memorial Foundation for Science and Technology , Japan Science Society , Sumitomo Foundation , and Iketani Science and Technology Foundation are also gratefully acknowledged.
PY - 2012/4
Y1 - 2012/4
N2 - 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.
AB - 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.
KW - Electron microscopy
KW - Luminescence
KW - Oxides
KW - X-ray diffraction
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U2 - 10.1016/j.materresbull.2012.01.007
DO - 10.1016/j.materresbull.2012.01.007
M3 - Article
AN - SCOPUS:84857994155
SN - 0025-5408
VL - 47
SP - 993
EP - 997
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 4
ER -