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Lanthanum Strontium Aluminum Tantalum Oxide (La,Sr)(Al,Ta)O3 (LSAT)

Lanthanum Strontium Aluminum Tantalum Oxide (La,Sr)(Al,Ta)O3 (LSAT)


Lanthanum Strontium Aluminum Tantalum Oxide (La,Sr)(Al,Ta)O3 (LAST)  crystal has no phase tarnsitions as temperature changed. The crystal structure is simliar with YBCO. It has lower thermal expansion and expansion coefficient than other perovskite structures. So the thin film can be deposited at a lower temperature to improve lattice mismatch and reduce stress.

Physical Properties

Material (La,Sr)(Al,Ta)O3 (LAST)
Structure Cubic
Lattice (A) a=3.868
Growth Method Czochralski
Hardness 6.5 (Mohns)
Melting point 1840℃
Density(g/cm3) 6.74 g/cm3
Thermal expansion 10 (x 10-6/℃)
Permittivity ε = 22
Color and appearance Coroless to light brown depending on  annealing


Size 10x3, 10x5, 10x10, 15x15, 20x20,Dia 15, Dia 20 Dia 1'', Dia 2''
Thickness 0.5 mm, 1.0 mm
Polished SSP or DSP
Orientation  <100>, <110>, <111>
Redirection precision ±0.5°
Redirection the edge 2°(special in 1°)
Angle of crystalline Special size and orientation are available for request
Ra: ≤5Å(5µm×5µm)


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