LMD

Substrate Materials

	GGG

	MgO

	SrTiO3

	LaAlO3

	LiGaO2,LiAlO2

	LSAT

	ZrO2

SrTiO3 (Strontium Titanate)

Applications

SrTiO₃ is an excellent and wide applied High Tc superconductive single crystalline substrate. Its lattice constant (3.905Å) fits the common high Tc superconductive material YBCO (3.88 Å) very well. It has twin-less crystal structure and very good physical and mechanical properties for film growth. It is suitable for various high Tc films such as YBCO, Bi-system, La-system and others. It is also suitable for different film growth technologies such as Magnet Sputtering, Pulsed Laser Deposition (PLD), Vapourization, MOCVD, CVD, and laser MBE etc. Films made by these materials and technologies on SrTiO3 substrate have excellent performance, for instance Tc>90K, Jc> = 10⁶A/cm².

1.Crystal Property

Crystal structure	cubic m³m Peroviskite
Cell parameter	a=3.905Å
Melting point	2353°K
Density	5.117g/cm³
Specific Heat	0.544J/g·k(300°K)
Thermal conductivity	11.2W/m·k
Thermal expansion	9.4x10^-6k^-1
Dielectric constant (εr)	300(295°K) 2000(80°K) (7-15GHz)
Dielectric loss (tgδ)	5x10^-4(295°K) 2.5x10^-4(80°K) Microwave
Hardness (Mohs)	6-6.5
Growth Method	Flame

2. Main Specifications:

Orientation：	＜100＞,＜110＞,＜111＞
Orientation accuracy:	±0.5°
Thickness tolerance:	±0.02mm Or ±0.005mm for special order.
Cut with special tilt angle：	available(tilt angle:1°-45°)
Standard Size:	Ф20mm,10x10,10x5,10x3, 20x20mm,
Thickness:	0.5mm 1.0mm.
Dimension Tolerance	+/-0.05mm
Faltness:	λ/4@633nm
Micro roughness （5μm×5μm）	Ra:≤5Å
Parallelism	< 30 arc Sec.
AR coatinfg	R<0.2% at centret wavlength