Journal
JOURNAL OF APPLIED PHYSICS
Volume 109, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3545809
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- U.S. Department of Energy [DE-AC02-05CH11231]
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Epitaxial LaCoO3 films were synthesized on LaAlO3 substrates to explore the role of epitaxial strain and structure on the ferromagnetism observed in these biaxially compressed films. Coherent strain and tetragonal structure were only achieved in thin film samples grown using higher energy densities. The strain relaxed with increasing thickness and was accompanied by increasing mosaic spread. Higher magnetization values were consistently seen in fully relaxed films grown using lower laser energy density. These results suggest that epitaxial strain is not the only factor determining the ferromagnetism and that the microstructure and defects may play a significant role. (C) 2011 American Institute of Physics. [doi:10.1063/1.3545809]
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