Growth of high-temperature phase KLu2F7 single crystals using quenching process

✍ Scribed by Hidehiko Tanaka; Yuki Furuya; Makoto Sugiyama; Yutaka Fujimoto; Valery Chani; Yuui Yokota; Takayuki Yanagida; Yoshiyuki Kawazoe; Akira Yoshikawa

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 751 KB
• Volume: 318
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2010.10.191

✦ Synopsis

KLu 2 F 7 single crystals were grown by micro-pulling-down method. KLu 2 F 7 has phase transition around 730 1C, which is between melting temperature and room temperature. The high-temperature phase is monoclinic and the low temperature phase is orthorhombic. To keep the temperature of as-grown crystal above the phase transition temperature, the conventional carbon hot zone was modified, and its temperature gradient was investigated. Using the modified setup, KLu 2 F 7 crystal with monoclinic (high temperature) phase was grown. After the growth procedure, the as-grown crystal was quenched to room temperature and it was found that the crystal keeps the monoclinic (high temperature) phase at room temperature.