Title
Epitaxial strain induced metal insulator transition in <tex>$La_{0.9}Sr_{0.1}MnO_{3}$</tex> and <tex>$La_{0.88}Sr_{0.1}MnO_{3}$</tex> thin films Epitaxial strain induced metal insulator transition in <tex>$La_{0.9}Sr_{0.1}MnO_{3}$</tex> and <tex>$La_{0.88}Sr_{0.1}MnO_{3}$</tex> thin films
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. :American Institute of Physics ,
Subject
Physics
Source (journal)
Applied physics letters / American Institute of Physics. - New York, N.Y., 1962, currens
Volume/pages
76(2000) :2 , p. 155-157
ISSN
0003-6951
1077-3118
ISI
000084541000009
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We are reporting an unexpected metal insulator transition at the ferromagnetic phase-transition temperature for thin films of La0.9Sr0.1MnO3 (< 50 nm), grown on a (100) face of SrTiO3 substrate. For the thicker films (> 50 nm), similar to the single crystal, no such transition is observed below T-C. Additionally, we observe the suppression of the features associated with charge or orbital ordering in intentionally La-deficient thin films of La0.88Sr0.1MnO3 (< 75 nm). In thin films, transmission electron microscopy reveals a compressive strain due to the epitaxial growth, that is, lattice parameters adopt those of the cubic lattice of SrTiO3. As the film thickness increases, coherent microtwinning is observed in the films and the films relax to a orthorhombic structure. (C) 2000 American Institute of Physics. [S0003-6951(00)00402-2].
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