Growth and Characterization of KMgF<sub>3</sub> Single Crystals by the Czochralski Technique under CF<sub>4</sub> Atmosphere
Kiyoshi ShimamuraInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanTomoyo FujitaInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanHiroki SatoInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanAmina Bensalah‐LedouxInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanNobuhiko SarukuraInstitute for Molecular Science, Okazaki 444-8585, JapanTsuguo FukudaInstitute for Materials Research, Tohoku University, Sendai 980-8577, Japan
2000en
ABI
Аннотация
KMgF 3 (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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