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    Growth of LiCoO2 Single Crystals by the TSFZ Method
    (Washington, DC : ACS Publ., 2018) Nakamura, Shigenobu; Maljuk, Andrey; Maruyama, Yuki; Nagao, Masanori; Watauchi, Satoshi; Hayashi, Takeshi; Anzai, Yutaka; Furukawa, Yasunori; Ling, Chris D.; Deng, Guochu; Avdeev, Maxim; Büchner, Bernd; Tanaka, Isao
    We have grown LiCoO2 single crystals by the traveling solvent floating zone (TSFZ) growth with Li-rich solvent, having observed the incongruent melting behavior of LiCoO2 between 1100 and 1300 °C. The optimum growth conditions in terms of atmosphere and solvent composition were determined to be Ar flow and an atomic ratio Li/Co 85:15, respectively. The crystals grown using a conventional-mirror-type furnace contained periodic inclusions of a Co-O phase due to the influence of Co-O phase segregation on the stability of the molten zone during growth. By using a tilted-mirror FZ furnace, inclusion-free LiCoO2 crystals of about 5 mm in diameter and 70 mm long were obtained at a tilting angle Î = 10°. The grown crystals were confirmed to be single-domain by neutron Laue diffraction. © 2018 American Chemical Society.