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SGGG

Sggg 결정, 즉 Ca Mg Zr 도핑된 가돌리늄 갈륨 가넷은 Bi Fe 가넷 에피택셜 필름을 위한 우수한 기판 재료입니다.

Product Descriptions

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



재료 특성

Material GGG SGGG
Chemical Formula Gd3Ga5O12 Substituted Gd3Ga5O12
Crystal Structure Cubic Cubic
격자 상수 a=12.383 Å a=12.497 Å
Growth Method Czochralski Czochralski
Hardness 8.0 7.5
밀도 7.13g/cm³ 7.09g/cm³
녹는 점 1725℃ 1730℃
Refractive Index 1.954 @ 1064nm 1.954 @ 1064nm



Technical Parameters

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

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