Melilite-Type Oxide SrGdGa₃O₇: Bulk Crystal Growth and Theoretical Studies upon Both Chemical Bonding Theory of Single Crystal Growth and DFT Methods

Abstract

The chemical bonding theory of single crystal growth has been applied to the SrGdGa 3 O 7 (SGGM) Czochralski growth system, and the optimized growth parameters were calculated. These optimized growth parameters were applied to the Czochralski growth system of SGGM, and the bulk crystal with dimensions of Φ 35 × 150 mm was obtained successfully. The crystal structure of SGGM was demonstrated. The theoretical calculations based on density functional theory methods were carried out on an SGGM crystal. Its band structure and density of state were presented. The present work deepens our understanding of the mesoscale process in the SGGM Czochralski growth system and the structures of an SGGM crystal. It can be concluded that this crystal is a good candidate for all-solid-laser host material.

Optical and Judd‐Ofelt spectroscopic study of Er3+‐doped strontium gadolinium gallium garnet single‐crystal

“…Strontium gadolinium gallium garnet (SrGdGa 3 O 7 ) single‐crystal displays some interesting properties, such as lower cut‐off phonon energy (~680 cm −1 ), higher heat conductivity, stronger mechanical strength, excellent piezoelectric property and ease to attain a large‐size single‐crystal with good optical quality. The crystal is an excellent laser host material because of following merits.…”

One-Dimensional Growth of Li2NiPO4F Single Crystals from Intermediate LiNiPO4 Crystal Surface Using KCl–KI Fluxes

“…25 This is based on the fact that all these materials crystallize into highly asymmetric lattices as their thermodynamically stable shapes (idiomorphic shapes), in which the crystal surfaces are surrounded by well-defined faces with lower surface energies. 18,26 Our current research efforts are focused on the anisotropicgrowth of Li-ion conducting materials from molten salts (flux growth). 27−30 Flux growth is a historical liquid-phase crystalgrowth technique that promotes the growth of idiomorphically shaped crystals.…”

“…The one-dimensional growth of an ionic crystalline material with an anisotropic crystal system (such as the orthorhombic system) from an isotropic media at low temperature is widely accepted from crystallographic perspectives . This is based on the fact that all these materials crystallize into highly asymmetric lattices as their thermodynamically stable shapes (idiomorphic shapes), in which the crystal surfaces are surrounded by well-defined faces with lower surface energies. , …”