Structure Deformation in GdCOB Single Crystals Grown by the Czochralski Method

作者: Andrzej Klos , Jarosław Z. Domagala , Andrzej Bajor , Anna Pajaczkowska

DOI: 10.1021/CG7012232

关键词: CrystalLaserYield (engineering)Core (optical fiber)Lattice constantBragg's lawCondensed matter physicsDeformation (meteorology)Crystal structureOpticsChemistry

摘要: Gadolinium calcium oxide borate GdCa4O(BO3)3 melts congruently, and single crystals with diameters of up to 35 mm lengths 70 were grown by the Czochralski method. Deformation crystal structure was observed. X-ray topography conoscopic polariscopic investigations revealed core situated in central part crystal, which not visible naked eye. The relative (b/bav) difference lattice parameter b region compared neighboring areas evaluated be on order 9.6 × 10−4. Outside mean value is constant, while fluctuations spatial distribution Bragg angle discovered. effect growth instabilities causes a certain deformation plane (interface). However, it did disturb optical properties, quite good crystalline area yield considerable second harmonic (532 nm) power laser experiments.

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