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Anomalous strain effect on magnetic properties of La 1− x Ba x MnO 3 epitaxial thin films
Author(s) -
Zhang Jun,
Tanaka Hidekazu,
Kanki Teruo,
Kawai Tomoji
Publication year - 2001
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.1006
Subject(s) - manganite , curie temperature , thin film , materials science , condensed matter physics , epitaxy , ferromagnetism , colossal magnetoresistance , magnetoresistance , pulsed laser deposition , substrate (aquarium) , composite material , nanotechnology , magnetic field , physics , oceanography , layer (electronics) , quantum mechanics , geology
We report an anomalous strain effect on magnetic properties in La 1− x Ba x MnO 3 (LBMO) thin films. Epitaxial LBMO films grown on SrTiO 3 (100) (STO) single‐crystal substrate by pulsed laser deposition suffer strains due to the lattice mismatch between LBMO and STO. For films with x = 0.1 and x = 0.2, tensile strain enhances the ferromagnetic state, resulting in the ferromagnetic Curie temperature T C increasing significantly compared with the corresponding bulk materials. However, for x = 0.3 and x = 0.33, T C decreases in thin films. These results are very different from the previous reported strain effect in other colossal magnetoresistance manganite thin films, and can be interpreted by considering the strain‐induced modification of orbital e g stability. Copyright © 2001 John Wiley & Sons, Ltd.