研究目的
Investigating the growth of atomically ordered and controllably-strained binary oxides with rocksalt structure using pulsed laser deposition technique for potential applications in electronic or electrochemical devices and basic research.
研究成果
PLD is an effective method for growing high-quality binary oxides with rocksalt structure, enabling control over strain and atomic order. The study successfully demonstrated the growth of strained NiO, MnO, and EuO films, highlighting the importance of tuning deposition parameters for each material.
研究不足
The study acknowledges the challenges in growing pure single-phase MnO and EuO due to their sensitivity to oxygen and the complexity of their phase diagrams. The fast strain relaxation in NiO films at high temperatures is also noted as a limitation.
1:Experimental Design and Method Selection:
The study systematically explores the use of pulsed laser deposition (PLD) to grow NiO, MnO, and EuO thin films with rocksalt structure. The methodology includes tuning laser fluence and growth temperature to achieve epitaxial single-phase growth.
2:Sample Selection and Data Sources:
The samples include NiO, MnO, and EuO thin films grown on various substrates (STO, MgO, LAO, YAO) under different conditions.
3:List of Experimental Equipment and Materials:
Equipment includes an Nd-YAG laser and a KrF excimer laser for film deposition, AFM for surface morphology, XRD for crystal structure analysis, and XRR for film thickness measurement.
4:Experimental Procedures and Operational Workflow:
Films were grown by PLD under varying conditions of laser fluence, growth temperature, and oxygen pressure. Post-deposition, films were cooled to room temperature at controlled rates.
5:Data Analysis Methods:
XRD and AFM were used to analyze the crystal structure and surface morphology of the films. XRR was used to measure film thickness and interface quality.
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