SrLaAlO4 Substrate

The strontium lanthanum aluminate (SrLaAlO4) crystal has no twins and phase transitions from the melting point to the low temperature. It has the same structure as the high-temperature superconductor YBCO. Compared with other substrates, the <001> plane has a moderate lattice mismatch with YBCO<001>. (2.5~3.5%). At the same time, the thermal expansion coefficient of this crystal is lower than that of other perovskite crystals, which can deposit films at lower temperatures to improve lattice mismatch and reduce stress.

OST Photonics offers high quality SrLaAlO4 substrates for researchers and industries. Crystal size and thickness can be customized according to your requirements.

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Features

  • No twins and phase transitions from the melting point to the low temperature

  • Good lattice mismatch with YBCO<001>

  • Low thermal expansion coefficient

Applications

  • Substrate material for high-temperature superconductor YBCO

Processing Capability

  • Orientation: <001>, etc.

  • Dimension: 1”, 2”, 2.6”, 10x5mm, 10x10mm, 15x15mm, 20x15mm, 20x20mm, etc.

  • Thickness: 0.5mm, 1.0mm, etc.

  • Available items: wafers, substrates, blanks and customized optics

Specification and Properties of SrLaAlO4 Substrates

Crystal Structure

Tetragonal

Lattice Constant

a=3.756 Å   c=12.63 Å

Melting Point

1650 ℃

Density

5.92 g/cm3

Hardness

6-6.5 Mohs

Dielectric Constants

ε=16.8

Growth Method

Czochralski

Orientation

<001>, etc.

Orientation Tolerance

±0.5° or better

Dimension

1”, 2”, 2.6”, 10x5mm, 10x10mm, 15x15mm, 20x15mm, 20x20mm, etc.

Dimension Tolerance

±0.1 mm or better

Thickness

0.5mm, 1.0mm, etc.

Thickness Tolerance

±0.05 mm or better

Surface Finish

Single side polished (SSP)/Double sides polished (DSP)

Roughness

Ra≤5Å

Package

Class 100 clean bag, Class 1000 super clean room