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Structure and properties of (Nd,Sr)(Al,Ta)O3 (NSAT) substrate crystals
Roberts Blukis1, Christian Rhode1, Thilo Remmele1
1Leibniz Institute for Crystal Growth (IKZ), Max-Born-Str. 2, 12489 Berlin, Germany.
Summary
Researchers characterized the novel cubic substrate material (Nd,Sr)(Al,Ta)O3 (NSAT). Despite nanoscale domain variations, its consistent lattice parameter ensures suitability for most substrate applications.
Area of Science:
- Materials Science
- Solid State Chemistry
- Crystallography
Background:
- Emerging cubic substrate materials are crucial for advanced applications.
- Understanding the structure-property relationship of novel substrates like (Nd,Sr)(Al,Ta)O3 (NSAT) is essential.
Purpose of the Study:
- To comprehensively analyze the structural and vibrational properties of the NSAT substrate.
- To elucidate the nanoscale domain ordering and its impact on material properties.
Main Methods:
- Powder and single-crystal X-ray diffraction.
- Transmission electron microscopy.
- Infrared (IR) and ultraviolet-visible (UV-Vis) ellipsometry.
- IR and Raman spectroscopies.
Main Results:
- NSAT exhibits a basic simple cubic perovskite structure on a large scale.
- Nanoscale domains with a doubled lattice parameter are observed.
- Vibrational spectroscopy reveals local deviations from ideal ordering.
Conclusions:
- The observed inhomogeneity in NSAT does not significantly affect its lattice parameter.
- NSAT is a promising substrate material for various applications due to its stable structure.
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