SGGG
Keywords:
SGGG
Category:
- Details
- Characteristics
- Parameters
- Application
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- Commodity name: SGGG
SGGG crystal, namely Ca Mg Zr doped gadolinium gallium garnet, is an excellent substrate material for Bi Fe garnet epitaxial films.
Gadolinium gallium garnet (GGG) substrate, one of the earlier developed garnet materials, can not be used as the substrate of high bismuth substituted iron garnet epitaxial layer because of its small lattice constant. Therefore, the sggg crystals with Ca, Mg and Zr as substitution ions are more suitable for the epitaxial films.
Main Advantages:
Low optical losses (<0.1%/cm)
High thermal conductivity (7.4W m-1K-1)
Typical applications:Substrate materials for YIG and BIG magneto-optical epitaxial membranes
Magnetic bubble memory storage
Magnetic refrigeration
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Material GGG SGGG Chemical Formula Gd3Ga5O12 Substituted Gd3Ga5O12 Crystal Structure Cubic Cubic Lattice Constant a=12.383 Å a=12.497 Å Growth Method Czochralski Czochralski Hardness 8.0 7.5 Density 7.13g/cm³ 7.09g/cm³ Melting Point 1725℃ 1730℃ Refractive Index 1.954 @ 1064nm 1.954 @ 1064nm -
Dimensions Max Diameter 101.6mm (4 inch) Thickness 0.5mm Other thickness upon request Polishing Single or double sides polishing Orientation <111>±0.2° Orientation Flat 2°（within 1° for special requirement） Ra Ra≤1nm, EPI ready Angle of Crystalline Special size and orientation are available upon request
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