Journal
JOURNAL OF APPLIED PHYSICS
Volume 111, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4705397
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Funding
- National Science Foundation [DMR-0747896]
- U.S. Department of Energy (DOE), Office of Basic Energy Sciences, Division of Materials Science and Engineering [DE-FG0203ER46057]
- Office of Science, Office of Basic Energy Sciences of the U.S. DOE [DE-AC02-05CH11231]
- Direct For Mathematical & Physical Scien [0747896] Funding Source: National Science Foundation
- Division Of Materials Research [0747896] Funding Source: National Science Foundation
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Superlattices composed of non-magnetic La0.5Sr0.5TiO3 and ferromagnetic La0.7Sr0.3MnO3 were grown by pulsed laser deposition on various substrates to impose different epitaxial strain states. Well-defined superlattice structures with sharp interfaces were observed using scanning transmission electron microscopy and confirmed by electron energy loss spectroscopy. Defects such as misfit dislocations, partial dislocations, and low-angle grain boundaries were found to partially or fully relax the epitaxial strain while dramatically increasing the magnetic coercive field. Conversely, a large tensile strain was seen to induce a tetragonal distortion in the film lattice and alter the magnetic and magneto-transport properties of the superlattices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4705397]
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