Growth and characterization of KMgF3 single crystals by the Czochralski technique under CF4 atmosphere

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作者
Shimamura, Kiyoshi [1 ]
Fujita, Tomoyo [1 ]
Sato, Hiroki [1 ]
Bensalah, Amina [1 ]
Sarukura, Nobuhiko [1 ]
Fukuda, Tsuguo [1 ]
机构
[1] Tohoku Univ, Sendai, Japan
关键词
Birefringence - Crystal growth from melt - Crystal orientation - Optical materials - Single crystals - Thermal expansion - Vacuum applications;
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摘要
KMgF3 (KMF) single crystals were grown by the Czochralski technique as a new candidate of vacuum-ultra-violet optical materials. The absorption edge of KMF single crystals was 115 nm. The distribution of birefringence in the radial direction was of the order of 10-7. The thermal expansion coefficient of KMF single crystals along the 〈111〉 orientation was 1.98×10-5 K-1. Together with its excellent mechanical properties, these characteristics show KMF to be superior to the current materials.
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页码:6807 / 6809
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