SGGG
Sggg crystal, namely Ca Mg Zr doped gadolinium gallium garnet, is an excellent substrate material for Bi Fe garnet epitaxial films.
File Download- Product Description
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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
- Material Properties
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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
- Technical Parameter
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Crystro offers:
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
Note: Above parameters for reference only, please contact our sales Rep. for your specific requirement.