SrLaAlO₄ /LaSrAlO₄ LSAO10x10x0.5mmt5x5x1mmt Substrate for Epitaxy customized

Abstract of SrLaAlO₄ / LaSrAlO₄/LASO

SrLaAlO₄ , also written as LaSrAlO₄ depending on the elemental order, is a complex oxide crystal composed of strontium (Sr), lanthanum (La), aluminum (Al), and oxygen (O). It is a member of the perovskite-related family of oxides, widely studied and used in materials science due to its favorable structural, thermal, and lattice-matching properties. The material is most well-known for its use as a substrate for the epitaxial growth of high-temperature superconducting (HTS) films.

Attribute Table of SrLaAlO₄ /LaSrAlO₄/LASO

Physical image of the SrLaAlO₄ /LaSrAlO₄/ LASO display

Benefits of the SrLaAlO₄ /LaSrAlO₄/ LASO as a substrate

Lattice Matching: The lattice constants of SrLaAlO₄ closely match those of YBCO and La₂CuO₄, resulting in low strain and high-quality epitaxial interfaces.

Thermal Stability: It withstands high-temperature deposition processes (up to ~1000 °C) without significant degradation.

Chemical Stability: Inert against most deposition atmospheres, including oxygen-rich environments used in oxide MBE and PLD.

Surface Quality: High-quality polishing yields flat, defect-free surfaces with roughness <1 nm RMS, essential for thin-film uniformity.

Common Applications of the SrLaAlO₄ /LaSrAlO₄/LASO

Epitaxial Substrate for High-Tc Superconductors

The most widespread use of LaSrAlO₄ is as a substrate for YBCO (YBa₂Cu₃O₇₋ₓ) and similar HTS films. It enables the growth of highly oriented, epitaxial, defect-free films, essential for maximizing the critical current density (Jc) and transition temperature (Tc).

Oxide Electronics

LaSrAlO₄ is suitable for the growth of other perovskite-type oxide films used in ferroelectrics, dielectrics, and spintronics. Films like LaAlO₃, SrTiO₃, or LaMnO₃ can be grown on LaSrAlO₄ substrates.

Photonic and Electro-Optic Devices

Due to its optical transparency and flat, stable surface, it can also serve as a host or base for optical coatings, waveguides, and nonlinear optical devices in the visible and near-infrared range.

Multiferroic Heterostructures

SrLaAlO₄ is also used in research involving multiferroic and magnetoelectric devices, where high-quality interfaces between layers are essential.

Q&A

Q:Why SrLaAlO₄ is Important?

A:The importance of SrLaAlO₄ arises primarily from its crystallographic compatibility with high-Tc superconducting films. One of the major challenges in growing high-quality superconducting thin films is lattice mismatch between the film and the substrate. Even a small mismatch can cause misfit dislocations, which degrade the superconducting properties. SrLaAlO₄ offers a nearly perfect lattice match to many oxide superconductors and related materials.

In addition, the thermal expansion coefficient of SrLaAlO₄ is also close to that of these films, minimizing thermal stress during temperature cycling (e.g., from deposition at high temperature to cooling for cryogenic measurements or applications).

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