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- Title
Response of the Electric Resistance of 40-nm-Thick La<sub>0.67</sub>Ca<sub>0.33</sub>MnO<sub>3</sub> Films to an Increase in the Lattice Mismatch between Film and Substrate.
- Authors
Boikov, Yu. A.; Danilov, V. A.
- Abstract
We have studied the structure and resistivity of 40-nm-thick La0.67Ca0.33MnO3 (LCMO) films coherently grown on (001)-oriented La0.29Sr0.71Al0.65Ta0.35O3 single crystal substrates bearing epitaxial interlayers of strontium titanate with a thickness of 7 or 70 nm. As the effective mismatch between the crystal lattice parameters of the film and substrate increases, the ρ value exhibits a sharp growth, while the maximum of the ρ(T) curve shifts by ∼40 K toward lower temperatures. At T < 150 K, the temperature dependence of the resistivity of the LCMO films obeys the relation ρ∼ρ1T 4.5, where the coefficient ρ1 decreases with increasing applied magnetic field strength and with decreasing lattice mismatch between the manganite film and the substrate. © 2005 Pleiades Publishing, Inc.
- Subjects
CRYSTALS; STRONTIUM; FILMSTRIPS; MAGNETIC fields; TEMPERATURE; SOLIDS
- Publication
Technical Physics Letters, 2005, Vol 31, Issue 1, p36
- ISSN
1063-7850
- Publication type
Article
- DOI
10.1134/1.1859494