GSGG Crystal Substrate

The Sc-doped gadolinium gallium garnet (GSGG,Gd₃Sc₂Ga₃O₁₂) crystal is a good magneto-optical crystal and the excellent substrate. GSGG is usually grown by the CZ method. GSGG crystal have a higher lattice constant than GGG crystal. GSGG substrate is used as substrates for liquid epitaxy and is dedicated substrates for magneto-optical film, expecially bismuth-substituted iron garnet epitaxial films, such as YIG, BiYIG, GdBIG. It’s good physical and mechanical properties and chemical stability.

Parameter

Physical and chemicalcharacteristics

Composition	Gd₃Sc₂Ga₃O₁₂
Crystal Structure	Cubic:
Purity	>99.99%
Growth method	Czochralski method
Lattice constant	a=12.554Å
Melting Point	~1730°C
Density	~7.09g/cm³
Mohs Hardness	~7.5
Refractive index	1.95
Dielectric constant	30
Dielectric loss tangent (10GHz)	3.0×10^-4

Main Specification

Product Name	GSGG substrate
Orientation	<111>±0.5° Or other off-angle
Standard Size	10x10mm 10x5mm 5x5mm Or others
Thickness	0.1mm 0.2mm 0.5mm 1.0mm Or others
Polishing	Fine ground Single side polished Double side polished Roughness: Ra<5A(0.5nm)