Journal
NANO LETTERS
Volume 14, Issue 5, Pages 2509-2514Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl500235f
Keywords
Manganites; perovskites; epitaxial ultrathin film; interfacial properties
Categories
Funding
- U.S. Army Research Office [W911NF-12-1-0132, W911NF-11-1-0283]
- DARPA [N66001-12-4224]
- ARO [W911NF-12-1-0133]
- US DOE [DE-AC02-06CH11357]
- U.S. DOE [DE-AC02-06CH11357]
- NSF [DMR-1053854]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1053854] Funding Source: National Science Foundation
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We investigate structural coupling of the MnO6 octahedra across a film/substrate interface and the resultant changes of the physical properties of ultrathin La2/3Sr1/3MnO3 (LSMO) films. In order to isolate the effect of interfacial MnO6 octahedral behavior from that of epitaxial strain, LSMO films are grown on substrates with different symmetry and similar lattice parameters. Ultrathin LSMO films show an increased magnetization and electrical conductivity on cubic (LaAlO3)(0.3)(Sr2AlTaO6)(0.7) (LSAT) compared to those grown on orthorhombic NdGaO3 (NGO) substrates, an effect that subsides as the thickness of the films is increased. This study demonstrates that interfacial structural coupling can play a critical role in the functional properties of oxide heterostructures.
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