|
Lanthanum Aluminate Single Crystal Substrate, (110), SSP (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®
|
This substrate exhibits natural twin domains and a brown-yellow to brown appearance that varies with annealing condition. The material is insoluble in mineral acids at room temperature but dissolves in phosphoric acid above 150°C, requiring controlled acid exposure.
- Chemical Stability Constraint: Avoid exposure to phosphoric acid at temperatures above 150°C to prevent substrate dissolution.
- Appearance Variability: The brown-yellow to brown coloration and presence of natural twin domains are intrinsic properties and not considered defects.
- Orientation Tolerance: The (110) orientation is specified to a tolerance of ±0.5° to ensure epitaxial film compatibility.
- Mechanical Handling Constraint: Use soft-tipped tweezers to handle the polished substrate and avoid scratching the surface.
- Storage Condition: Store substrates in a clean, dry environment within the original box to minimize contamination and moisture adsorption.
How does the loss tangent of Lanthanum Aluminate (110) substrates vary with temperature, and what are the implications for cryogenic device applications?
The loss tangent of LaAlO3 (110) substrates is approximately 3 × 10−4 at 300 K and decreases to about 0.6 × 10−4 at 77 K, indicating significantly lower dielectric loss at cryogenic temperatures. This temperature dependence makes the substrate particularly suitable for high-Q resonant circuits and superconducting device applications operating at liquid nitrogen temperature.
What is the impact of natural twin domains in polished LaAlO3 (110) substrates on the crystalline quality of epitaxial thin films?
Polished LaAlO3 (110) substrates exhibit natural twin domains, which can introduce local orientation variations and affect the surface uniformity for epitaxial growth. The pseudo-cubic lattice constant of 3.792 Å offers a lattice match for certain perovskite oxides, but twin domains may require careful selection or annealing to achieve high-quality, single-domain film deposition.
What are the recommended chemical cleaning or etching procedures for Lanthanum Aluminate (110) substrates to avoid damage?
LaAlO3 substrates are insoluble in mineral acids at room temperature, so standard acid cleaning (e.g., HCl, HNO3) at room temperature is safe. However, they are soluble in H3PO4 above 150°C, so hot phosphoric acid etching should be avoided or used only under controlled conditions. Organic solvents and mild acids are typically recommended for routine surface cleaning.
Lanthanum aluminate (110) substrates provide low dielectric loss at 77 K and strong acid resistance, but natural twin domains and hot phosphoric acid sensitivity impose processing constraints.
Positive
- Low dielectric loss at cryogenic temperatures: Loss tangent of ~0.6 × 10-4 at 77 K enables high-quality factor performance in low-temperature RF and microwave devices.
- Excellent room-temperature acid resistance: Insoluble in mineral acids at room temperature, allowing standard wet processing steps without degradation.
Trade-offs
- Natural twin domains in polished substrates: The polished substrate exhibits natural twin domains, which may affect uniformity in epitaxial growth or device fabrication requiring single-domain orientation.
- Solubility in hot phosphoric acid: The substrate is soluble in H3PO4 above 150°C, requiring careful temperature control during any hot phosphoric acid etching steps.
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).
