Thin films synthesis and characterization
Structural and Optical Properties of High Entropy (La,Lu,Y,Gd,Ce)AlO3 Perovskite Thin Films, Advanced Science, 2022
This work describes the synthesis of high-entropy epitaxial perovskite oxide films composed of multiple luminescent centers Gd3+ and Ce3+. Such materials exhibit the ability of UV to visible light energy transfer. The experimental results offer a pathway to tunable optical properties for a range of applications.
Oxygen Transfer in Oxide Heterostructures
In article number 2101867, Zachary Corey, Quanxi Jia, Aiping Chen, and co-workers demonstrate that the growth of an oxide layer in a suitable condition can lead to oxygen transfer from the substrate to the film during growth. Such oxygen transfer forms a conductive substrate surface layer that contributes to the observed high carrier mobility.
Our results have revealed that both epitaxial strain and strain relaxation induced stoichiometry/microstructure modulations contribute to the modified functional properties in lightly doped manganite perovskite thin films.
Substrate oxygen sponge effect: A parameter for epitaxial manganite thin film growth, Appl. Phys. Lett. 117, 151601 (2020)
This work shows the critical role of oxygen in substrate in epitaxial thin films growth when the growth pressure is relative low.
Anisotropic domains and antiferrodistortive-transition controlled magnetization in epitaxial manganite films on vicinal SrTiO3 substrates, Appl. Phys. Lett. 117, 081903 (2020)
We see very interesting microstructure and magnetism properties in ferroelastic La0.9Sr0.1MnO3 (LSMO) epitaxial thin films grown on SrTiO3 (001) substrates with different miscut angles.
Here, a room-temperature FMI is achieved in ultrathin La0.9Ba0.1MnO3 films grown on SrTiO3 substrates via an interface proximity effect.
Hidden Interface Driven Exchange Coupling in Oxide Heterostructures, This work discussed the origin of the exchange bias coupling in single phase LSMO thin films.
This work demonstrated that the controlling of cation stoichiometry, surface morphology, and leakage current by oxygen pressure is one of very important prerequisites for device applications in the BaTiO3 films. Cited over 100 times.