Liquid Phase Epitaxial Growth of CaMoO4: Nd Film Crystals

Shuji OISHI*, Hiroki MORIKAWA†, Keigo HOSHIKAWA††, Kenji KITAMURA†††,
Tsuyoshi KOBAYASHI†††† and Shinichi WAKABAYASHI††††

Department of Environmental Science and Technology, Faculty of Engineering, Shinshu University;
Wakasato, Nagano-shi 380-8553 Japan
† Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University;
Wakasato, Nagano-shi 380-8553 Japan
†† Faculty of Education, Shinshu University; Nishinagano, Nagano-shi 380-8544 Japan
††† National Institute for Research in Inorganic Materials; Namiki, Tsukuba-shi 305-0044 Japan
†††† R & D Department, Shinko Electric Industries Co., Ltd.; Oshimada-machi, Nagano-shi
381-2287 Japan

Calcium molybdate film crystals doped with neodymium (CaMoO4: Nd) were grown from an Na2MoO4 flux by a liquid phase epitaxial method. The growth was conducted by immersing CaMoO4 substrate crystals (about 3 mm×3 mm) in the high-temperature solutions (1000 °C) of CaMoO4 (28.5 mol%)-Na2MoO4 (71.5 mol%) containing a small amount of Nd2O3 for 8 h, and subsequent cooling to 950, 900 or 850 °C at a rate of 6 °C h−1. Pale purple and transparent CaMoO4: Nd film crystals were homoepitaxially grown on the substrate crystals. The grown crystals were up to about 58 μm in thickness depending upon the slow cooling range. The indices of the well-developed faces were {112}. Neodymium was homogeneously incorporated in the film crystals. Sodium from the flux was also incorporated in the crystals.


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