Next Article in Journal
Natural Deposit Coatings on Steel during Cathodic Protection and Hydrogen Ingress
Next Article in Special Issue
Sputter-Deposited Indium–Tin Oxide Thin Films for Acetaldehyde Gas Sensing
Previous Article in Journal
Coating Acetylated Wood
Previous Article in Special Issue
Empirical-Statistical Study on the Relationship between Deposition Parameters, Process Variables, Deposition Rate and Mechanical Properties of a-C:H:W Coatings
Open AccessArticle

On the Novel Biaxial Strain Relaxation Mechanism in Epitaxial Composition Graded La1−xSrxMnO3 Thin Film Synthesized by RF Magnetron Sputtering

Surface and Nano Engineering Laboratory, Department of Material Science and Engineering, University of Texas at Arlington, Arlington, TX 76013, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Joaquim Carneiro
Coatings 2015, 5(4), 802-815; https://doi.org/10.3390/coatings5040802
Received: 1 October 2015 / Revised: 4 November 2015 / Accepted: 6 November 2015 / Published: 11 November 2015
We report on a novel method to fabricate composition gradient, epitaxial La1−xSrxMnO3 thin films with the objective to alleviate biaxial film strain. In this work, epitaxial, composition gradient La1−xSrxMnO3, and pure LaMnO3 and La0.67Sr0.33MnO3 thin films were deposited by radio frequency (RF) magnetron sputtering. The crystalline and epitaxy of all films were first studied by symmetric θ–2θ X-ray diffraction (XRD) and low angle XRD experiments. Detailed microstructural characterization across the film thickness was conducted by high-resolution transmission electron microscopy and electron diffraction. Four compositional gradient domains were observed in the La1−xSrxMnO3 film ranging from LaMnO3 rich to La0.67Sr0.33MnO3 at the surface. A continuous reduction in the lattice parameter was observed accompanied by a significant reduction in the out-of-plane strain in the film. Fabrication of the composition gradient La1−xSrxMnO3 thin film was found to be a powerful method to relieve biaxial strain under critical thickness. Besides, the coexistence of domains with a composition variance is opening up various new possibilities of designing new nanoscale structures with unusual cross coupled properties. View Full-Text
Keywords: magnetron sputtering; strontium doped lanthanum manganite; epitaxial thin films; functionally graded materials; thin film characterization magnetron sputtering; strontium doped lanthanum manganite; epitaxial thin films; functionally graded materials; thin film characterization
Show Figures

Figure 1

MDPI and ACS Style

Wang, Y.; Zhang, M.; Meletis, E.I. On the Novel Biaxial Strain Relaxation Mechanism in Epitaxial Composition Graded La1−xSrxMnO3 Thin Film Synthesized by RF Magnetron Sputtering. Coatings 2015, 5, 802-815.

Show more citation formats Show less citations formats

Article Access Map

1
Only visits after 24 November 2015 are recorded.
Back to TopTop