Abstract
CaNb2O6 single crystals with an orthorhombic columbite structure are grown via an optical floating zone (OFZ) method. The as-grown crystals are colorless and free of low-angle grain boundaries and inclusions. They are transparent (up to 62%) in the visible to the infrared region (400–1000 nm) and have a low absorption coefficient (α = 1.56). The bandgap is determined as a direct transition and Eg = 4.28 eV. The wavelength-dependent refractive index and extinction coefficient of the CaNb2O6 crystals are derived from the obtained T and α spectra. Their photoluminescence spectra exhibit a strong and broad emission band centered at 465 nm.
Highlights
The X-ray diffractometer (XRD) pattern of the powder sample was refined via the Rietveld method by using GASA software
CaNb2 O6 single crystals are grown through the optical floating zone (OFZ)
The measured transmission is up to 62% in the visible-to-infrared region (400–1000 nm), and the absorption coefficient of α = 1.56 is low
Summary
In 1968, CaNb2 O6 crystals were grown via a chemical transport method [19] (crystal dimension: 1 mm × 0.2 mm × 0.5 mm); in 1998, they were fabricated through a flux method [20] (size: 0.8 mm × 0.8 mm × 0.05 mm). In 2004, R. de Almeida Silva et al [21] grew CaNb2 O6 crystals fiber through laser-heated pedestal growth. By this method, they avoided impurities, but they obtained small-dimension crystal fibers (Ø < 1 mm). Considering the abovementioned factors, we grow CaNb2 O6 single crystals via an OFZ method. Pure CaNb2 O6 single crystals were grown via the OFZ method.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
