|
Lanthanum Aluminate Single Crystal Substrate, (111), DSP (10 pcs/box)
Product Type: LaAlO3 single crystal substrate
Research-grade laboratory product
|
|||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||
|
LABORATORY PROCUREMENT SUPPORT
For material matching, specification review, model selection or configuration confirmation, contact our technical sales team.
E-MAIL: inquiry@atomfair.com
|
|||||||||||||||||||||||||||||||||||||||||||||||||||
|
Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
|
The substrate is chemically stable in mineral acids at room temperature but dissolves in phosphoric acid above 150°C. Orientation tolerance is ±0.5°, and polished surfaces exhibit natural twin domains that may influence thin-film growth.
- Chemical Stability Constraint: Avoid exposure to phosphoric acid above 150°C as the substrate is soluble under those conditions.
- Orientation Tolerance: The crystal orientation is specified to within ±0.5° to ensure consistent epitaxial alignment.
- Twin Domain Presence: Polished substrates contain natural twin domains which should be considered for applications requiring uniform surface structure.
How do the natural twin domains in LaAlO3 (111) substrates affect epitaxial film growth and microwave loss?
The substrate exhibits natural twin domains due to its pseudo-cubic structure, which can introduce local misorientation in deposited films. The loss tangent is ~3×10⁻⁴ at 300 K and ~0.6×10⁻⁴ at 77 K, indicating low microwave loss at cryogenic temperatures, but twin domains may cause variations in film uniformity and dielectric performance.
What is the lattice constant and crystal structure of LaAlO3 (111) substrates relevant for thin-film deposition?
LaAlO3 substrates have a pseudo-cubic crystal structure with a lattice constant of 3.792 Å. This lattice parameter is critical for matching the in-plane lattice of deposited thin films to minimize strain and defects. The orientation tolerance is ±0.5°.
What are the chemical stability and handling precautions for Lanthanum Aluminate (LaAlO3) single crystal substrates?
Lanthanum aluminate substrates are insoluble in mineral acids at room temperature but are soluble in phosphoric acid (H3PO4) above 150°C. They have a brown-yellow appearance and may exhibit natural twin domains; polished surfaces should be protected from contamination. Storage in a clean, dry environment is recommended.
This Lanthanum Aluminate (LaAlO3) single crystal substrate with (111) orientation and DSP surface finish is available in 5×5×0.5 mm and 10×10×0.5 mm sizes. Key technical attributes include a pseudo-cubic lattice constant of 3.792 Å, high melting point of 2080°C, and low loss tangent of ~0.6×10⁻⁴ at 77 K, making it suitable for high-temperature thin-film deposition and cryogenic RF applications.
Positive
- High melting point for thermal processing: Melting point of 2080°C allows high-temperature thin-film deposition and annealing without substrate degradation.
- Low loss tangent at cryogenic temperatures: Loss tangent of ~0.6×10⁻⁴ at 77 K minimizes dielectric losses in low-temperature RF and microwave device applications.
Trade-offs
- Natural twin domains in polished substrates: Polished substrates exhibit natural twin domains that may introduce structural inhomogeneities affecting epitaxial film quality.
- Limited chemical etch compatibility: Insoluble in mineral acids at room temperature; only soluble in H₃PO₄ above 150°C, restricting wet-chemical cleaning and patterning options.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
