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  1. No Access

    Article

    Thermoelectric Properties of Nb-Doped SrTiO3/TiO2 Eutectic Solids Fabricated by Unidirectional Solidification

    Undoped and Nb-doped SrTiO3/TiO2 (STO/TO) eutectic solids were fabricated from the melt at a eutectic point of STO and TO by unidirectional solidification. Fabricated undoped and Nb:STO/TO eutectic solids were co...

    Yuui Yokota, Shigeru Horii, Hiraku Ogino, Masao Yoshino… in Journal of Electronic Materials (2019)

  2. No Access

    Article

    Growth and scintillation properties of Eu and Ce doped LiSrI3 single crystals

    In this study, Eu and Ce doped LiSrI3 single crystals were explored and the scintillation performance was reported at the first time. Eu and Ce doped LiSrI3 single crystals were grown by the Bridgman–Stockbarger ...

    Kei Kamada, Masao Yoshino, Rikito Murakami… in Journal of Materials Science: Materials in… (2017)

  3. No Access

    Article

    Effects of dopant distribution improvement on optical and scintillation properties for Ce-doped garnet-type single crystals

    Ce-doped garnet-type single crystals with improved dopant distribution were grown by the micro-pulling-down method using a modified Iridium crucible and effects of dopant distribution improvement on the optica...

    Yuui Yokota, Tetsuo Kudo, Yuji Ohashi… in Journal of Materials Science: Materials in… (2017)

  4. No Access

    Article

    Growth of LiF/LiBaF3 eutectic scintillator crystals and their optical properties

    Li-containing materials can be applied as neutron scintillators, and LiBaF3 can discriminate neutron and gamma rays. Moreover, LIF/LiBaF3 can have higher cross section of thermal-neutron capture compared with LiB...

    Shunsuke Kurosawa, Akihiro Yamaji, Jan Pejchal, Yuui Yokota… in Journal of Materials Science (2017)

  5. No Access

    Article

    Polycrystalline Yb3+–Er3+-co-doped YAG: Fabrication, TEM-EDX characterization, spectroscopic properties, and comparison with the single crystal

    Yttrium aluminum garnet (YAG)-based ceramics represent a valuable alternative to single crystals as active media in laser devices for specific applications. In this connection, the 1.5–1.65 µm emission channel...

    Jan Hostaša, Laura Esposito, Annie Malchère… in Journal of Materials Research (2014)

  6. No Access

    Article

    Growth and Characterization of Shape-Controlled Single Crystals by a Micro-pulling-down Method

    Shape-controlled CaF2 and sapphire crystals were grown by a micro-pulling-down (μ-PD) method and the crystallinities were investigated By the μ-PD method with crucibles which have special configurations, circular...

    Yuui Yokota, Hidehiko Tanaka, Masato Sato, Valery Chani… in MRS Online Proceedings Library (2011)

  7. No Access

    Article

    Growth of Optical Crystals by the Micro-Pulling-Down Method

    The micro-pulling-down technique is a crystal growth method that has been mostly developed since 1992. The general scheme of the growth system is relatively simple: the melt (oxide, fluoride, metal) residing i...

    Akira Yoshikawa, Valery Chani in MRS Bulletin (2009)

  8. No Access

    Article

    Ammonothermal synthesis of thick gallium nitride film employing acidic mineralizers

    Fabrication of wurtzite-type gallium nitride (GaN) thick films on HPVE-grown {0001} GaN substrates under moderate ammonothermal conditions is reported. Supercritical ammonia (NH3) as solvent and the mineralizer a...

    Dirk Ehrentraut, Yuji Kagamitani, Akira Yoshikawa… in Journal of Materials Science (2008)

  9. No Access

    Chapter

    Scintillating Bulk Oxide Crystals

    The application of the micro-pulling-down (μ-PD) method to the growth of scintillating bulk (over 1mm in diameter or cross-section) crystals, as well as to investigations of their optical and luminescent properti...

    Akira Yoshikawa, Martin Nikl in Shaped Crystals (2007)

  10. No Access

    Chapter

    Binary Fluorides: (Gd,Y)F3 and K(Y,Lu)3F10

    The growth of rare-earth fluoride solid-solution crystals by the micro-pulling-down method is reviewed, focusing on the trifluorides Gd1−x YxF3 and Gd1−x YbxF3 (x = 0.12–0.42) in p...

    Akira Yoshikawa, Tomohiko Satonaga in Shaped Crystals (2007)

  11. No Access

    Chapter

    High-Melting Rare-Earth Sesquioxides: Y2O3, Lu2O3, and Sc2O3

    In this chapter the application of the μ-PD method to the crystal growth of refractory rare-earth sesquioxides with melting temperatures of over 2400°C is demonstrated and discussed.

    Akira Yoshikawa, Andrey Novoselov in Shaped Crystals (2007)

  12. No Access

    Article

    NASICON-like phases in ScPO4-Na3PO4-Li3PO4 quasiternary system

    Phase formation in ternary system of complex Sc, Na and Li phosphates was studied at 950°C and synthesis of new phases of definite composition was carried out. Obtained samples were investigated with X-ray pow...

    Mariya Zhuravleva, Ruslan Zakalyukin, Valeriy Fomichev… in MRS Online Proceedings Library (2006)

  13. No Access

    Article

    Ti-doped MgAl2O4 spinel single crystals grown by the micro-pulling-down method for laser application: Growth and strong visible blue emission

    The photoluminescence spectra of the rod-shaped pure and Ti-doped MgAl2O4 single crystals, grown by the micro-pulling-down (μ-PD) method, have been systematically investigated under high-intensity pulsed Nd3+: YA...

    Anis Jouini, Hiroki Sato, Akira Yoshikawa, Tsuguo Fukuda… in Journal of Materials Research (2006)