GSGG Substrate
GGG (12.373Å) has a similar lattice constant of YIG (12.376Å), it is widely used as the substrate material of YIG magneto-optical thin film. However, in order to improve the magneto-optical optimum value of magneto-optical thin film, sometimes it is necessary to select a single crystal substrate with a larger lattice constant. GSGG (12.554Å) is that the 2 Ga of the octahedron in the GGG crystal are replaced by Sc with a larger ionic radius, thus having a larger lattice constant.
OST Photonics offers high quality GSGG substrates for researchers and industries. Crystal size and thickness can be customized according to your requirements.
Features
Low optical loss
High thermal conductivity
High laser damage threshold
Good mechanical properties and chemical stability
Applications
Microwave isolators
Optical communication
Magnetic refrigeration
Processing Capability
Orientation:<111>, etc.
Dimension: 10x10mm, 10x5mm, 5x5mm, etc.
Thickness: 0.5mm, 1.0mm, etc.
Available items: substrate, blanks and customized optics
Specification and properties of GSGG Substrates
Crystal Structure | Cubic |
Growth Method | Czochralski |
Lattice Constant | a=12.554 Å |
Melt Point | 1750 ℃ |
Purity | 99.99% |
Density | 7.09 g/cm3 |
Hardness | 7.5 Mohs |
Refractive Index | 1.95 |
Orientation | <111>, etc. |
Orientation Tolerance | ±0.5° or better |
Dimension | 10x10mm, 10x5mm, 5x5mm, etc. |
Dimension Tolerance | ±0.1 mm or better |
Thickness | 0.5mm, 1.0mm, etc. |
Thickness Tolerance | ±0.05 mm or better |
Surface Finish | Single side polished (SSP)/Double sides polished (DSP) |
Surface Roughness | Ra≤5Å (5×5µm) |
Package | Class 100 clean bag, Class 1000 super clean room |
Lattice Constants of Several Garnet Crystals
Crystallochemical Formula | GGG (Gd3Ga5O12) | YSGG (Y3Sc2Ga3O5) | CaMgZr:GGG (Gd2.6Ca0.4)(Ga4.1Mg0.25Zr0.65)O12 | GYSGG (Gd0.63Y2.37Sc2Ga3O12) | GSGG (Gd3Sc2Ga3O12) |
Lattice Constant | 12.373 Å | 12.426 Å | 12.480 Å | 12.507 Å | 12.554 Å |
Diffraction (2θ) | 51°7′ | 50°44′ | 50°43′ | 50°40′ | 50°22′ |