SrTiO3 STO Strontium Titanate Crystal Substrates

  • £2000

SrTiO3 (STO) Strontium Titanate Crystal Substrates

CAS Number: 12060-59-2; EC Number: 235-044-1

SrTiO3 single crystal has its lattice parameters match most materials with a Perovskite crystal structure, and therefore it is a popular crystal substrate for epitaxial growth of many oxide thin films. It is commonly used as substrate material for superconductor thin films, because Strontium Titanate (SrTiO3) and Y-Ba-Cu-O system (a = 3.89 A) have similar values in the lattice constant.

Both standard and custom-made Strontium Titanate crystal substrates are available from MSE Supplies.

Main Physical Properties of Strontium Titanate Crystal Substrates
Crystal structure
Cubic, Perovskite
Molar mass (g/mol) 183.49
Growth method
Vernue (flame) method
Purity (%) >99.9%
Lattice constant
a = 3.905 A
Melting point (°C)
Density (g/cm3)
6-6.5 Mohs
Refractive index 2.394 
Thermal expansion coefficient (/K)
9.4 x 10-6
Dielectric constants
300 at room temperature
Chemical stability
Insoluble in water
Loss Tangent at 10 GHz
~5x10-4 @ 300K , ~3 x10-4 @77K
5x5 mm, 5x10 mm, 10x10 mm, 20x20 mm, or special sizes and orientations are available upon request
0.5mm, 1.0mm
Size tolerances
+/- 0.1mm
Thickness tolerances
+/- 0.015mm
Single side polished (SSP) or double side polished (DSP), Epi-ready surface Ra < 0.5 nm
Orientation precision
+/-0.5 degree
Crystal orientation
(100), (110), (111)
Packed in class 100 grade plastic bag in class 1000 clean room