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LSAT (La, Sr) (Al, Ta) O3 is a relatively mature unluan crystal perovskite crystal, well matched with high temperature superconductors and a variety of oxide materials. In a large amount of practical research and use, it is expected to replace lanthanum aluminate (LaAlO3) and strontium titanate (SrTiO3) for giant magneto ferroelectric and superconducting devices.
Materials Properties
| Growing directions | Czochralski method |
| Crystal structure | cube |
| Lattice constant | a=3.868 A |
| Melting point (℃) | 1840 |
| Density (g/cm3） | 6.74 |
| Hardness (Mho) | 6.5 |
| Dielectric constant | 22 |
| Thermal expansion coefficient to heat | 10 x 10-6/K |
| Color and Appearance | According to the annealing situation from colorless to light brown, without Lu'an crystal and visible domain |
| Crystal orientation | <100>、<110>、<111>±0.5º |
| Crystal surface orientation accuracy | ±0.5° |
| Edge orientation accuracy | 2° (up to 1°) |
| Slant chip | The wafer may be tilted at a specific angle (1° -45°) |
| Harshness | ≤5Å（5µm×5µm） |
