Floating zone growth and optical properties of nickel tantalum oxide single crystals

• Published in: Materials research bulletin 1994-04, Vol.29 (4), p.385-391
• Main Authors: Ando, Kazuto, Higuchi, Mikio, Takahashi, Junichi, Kodaira, Kohei
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Methods of crystal growth; physics of crystal growth; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physics; Theory and models of crystal growth; physics of crystal growth, crystal morphology and orientation; Theory and models of film growth
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/0025-5408(94)90071-X

NiTa 2O 6 single crystals with trirutile structure were successfully grown by a floating zone (FZ) method. The as-grown crystals were black and opaque. After annealing in air, the crystals were pale-green and transparent. The interference figure observed with a polarizing microscope demonstrated that the grown crystals had little stress birefringence. The refractive indices for ordinary and extraordinary rays were 2.29 and 2.44 under white light, respectively, and the birefringence was 0.15. NiTa 2O 6 had strong absorption spectra in the wave length ranges of 300–500, 650–900 and 1100–1600 nm.