Oxygen exchange kinetics and nonstoichiometry of pristine La0.6Sr0.4CoO3−δ thin films unaltered by degradation

AbstractThe growth, structural and cathodoluminescent (CL) properties of europium activated yttrium oxide (Eu:Y2O3) thin films are reported. The Eu:Y2O3 films were grown in-situ using a pulsed laser deposition technique. Our results show that Eu:Y2O3 films can grow epitaxially on (100) LaAlO3 substrates under optimized deposition parameters. The epitaxial growth of Eu:Y2O3 films on LaAlO3, which has a lattice mismatch of ∼ 60 %, is explained by matching of the atom positions in the lattices of the film and the substrate after a rotation. CL data from these films are consistent with highly crystalline Eu:Y2O3 films with an intense CL emission at 611 nm.

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Pulsed Laser Deposition of High-Quality Manganite Thin Films at Low Background Pressures with in-situ Reflection High Energy Electron Diffraction

ECS Transactions ◽

10.1149/1.2357097 ◽

2019 ◽

Vol 3 (9) ◽

pp. 55-63 ◽

Cited By ~ 1

Author(s):

Antonello Tebano ◽

Carmela Aruta ◽

Pier Gianni Medaglia ◽

Giuseppe Balestrino ◽

Norberto G. Boggio ◽

...

Keyword(s):

Thin Films ◽

Electron Diffraction ◽

Pulsed Laser Deposition ◽

Pulsed Laser ◽

High Energy ◽

Laser Deposition ◽

High Energy Electron ◽

High Quality ◽

Low Background

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Oxygen in Complex Oxide Thin Films Grown by Pulsed Laser Deposition: a Perspective

Journal of Superconductivity and Novel Magnetism ◽

10.1007/s10948-019-05276-5 ◽

2019 ◽

Vol 33 (1) ◽

pp. 205-212 ◽

Cited By ~ 1

Author(s):

Gertjan Koster ◽

Dave H. A. Blank ◽

Guus A. J. H. M. Rijnders

Keyword(s):

Thin Films ◽

Pulsed Laser Deposition ◽

Pulsed Laser ◽

Complex Oxide ◽

Laser Deposition ◽

Oxygen Stoichiometry ◽

Oxide Thin Films ◽

Film Synthesis ◽

Kinetics Of ◽

Oxidation Mechanisms

Abstract For thin film synthesis of complex oxides, one of the most important issues has always been how to oxidise the material. For a technique like pulsed laser deposition, a key benefit is the relatively high oxygen background pressure one can operate at, and therefor oxidation should be relatively straightforward. However, understanding the microscopic oxidation mechanisms turns out to be rather difficult. In this perspective, we give a brief overview of the sources of oxidation for complex oxide thin films grown by pulsed laser deposition. While it is clear what these sources are, their role in the kinetics of the formation of the crystal structure and oxygen stoichiometry is not fully understood.

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Microwave Phase Shifters: Epitaxial Growth by Pulsed Laser Deposition of Dielectric Ba0.5Sr0.5TiO3 Thin Films on MgO

MRS Proceedings ◽

10.1557/proc-0902-t10-25 ◽

2005 ◽

Vol 902 ◽

Author(s):

YauYau Tse ◽

P. S. Suherman ◽

T. J. Jackson ◽

I. P. Jones

Keyword(s):

Thin Films ◽

Pulsed Laser Deposition ◽

Strain Relaxation ◽

Pulsed Laser ◽

Phase Shifters ◽

Laser Deposition ◽

Ex Situ ◽

Misfit Dislocations ◽

Epitaxial Relationship

AbstractBa0.5Sr0.5TiO3 (BSTO) thin films were grown on (001) MgO using pulsed-laser deposition (PLD). The microstructures of in-situ and ex-situ annealed BSTO films were studied by X-ray diffraction and transmission electron microscopy (TEM). The films showed a cube on cube epitaxial relationship with <100> BSTO // <100> MgO. They were essentially single crystals with a columnar structure and possessed smooth surfaces. The interfaces of the BSTO films and substrates were atomically sharp, with misfit dislocations. Better crystallinity and full strain relaxation was obtained in films grown in 10-1 mbar oxygen and annealed ex-situ. A 30% increase in dielectric tuneability was achieved compared with in-situ annealing and deposition at 10-4 mbar. Threading dislocations are the dominant defects in the films grown in 10-1 mbar oxygen and annealed ex-situ, while the films with in-situ annealing show columnar structures with low angle boundaries.

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