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Proceedings Paper

Substrate- and growth-related microstructural and magnetic properties in La0.67Sr0.33MnO3 thin films
Author(s): Marilyn E. Hawley; Geoffrey W. Brown; Chuhee Kwon; Quanxi Jia
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Paper Abstract

Ambient observation of magnetic domain structures by magnetic force microscopy (MFM) in La0.67Sr0.33MnO3 films has not been clearly correlated with stresses induced by kinetic growth processes or the compressive (LaAlO3) or tensile (SrTiO3) nature of the film-substrate lattice mismatch. Although domain-like magnetic structures have been seen for some as-grown films and related to substrate-induced stress and film thickness, no magnetic structure has been seen for other films grown under similar conditions on the same pair of substrates. In this study we have grown films over a range of temperatures by pulsed-laser deposition, using the above substrates, to determine the relationship between growth and stress-induced magnetic structures. Results from scanning tunneling, atomic force, and magnetic force microscopies, measurements of temperature-dependent magnetization and structure-dependent coercivity show the relationship between growth and magnetic properties. Maze-like domain structures, with separations between 150 nm and 200 nm, were only observed for the thicker films grown at the highest temperature, 800 degrees Celsius. Application of an in-plane magnetic field converted these domain structures to stripe-like domains whose spacing and out of plane component decreased as the field was increased.

Paper Details

Date Published: 22 December 1998
PDF: 11 pages
Proc. SPIE 3481, Superconducting and Related Oxides: Physics and Nanoengineering III, (22 December 1998); doi: 10.1117/12.335911
Show Author Affiliations
Marilyn E. Hawley, Los Alamos National Lab. (United States)
Geoffrey W. Brown, Los Alamos National Lab. (United States)
Chuhee Kwon, Los Alamos National Lab. (United States)
Quanxi Jia, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 3481:
Superconducting and Related Oxides: Physics and Nanoengineering III
Davor Pavuna; Ivan Bozovic, Editor(s)

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