Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3193667
Keywords
ferromagnetic materials; lanthanum compounds; magnetic thin films; precipitation; pulsed laser deposition; scanning electron microscopy; segregation; stoichiometry; transmission electron microscopy
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Funding
- TEPCO Research Foundation
- NSF-MRSEC
- International Academic Exchange Program of the University of Tokyo
- Endowed Graduate Student Financial Aid of Cornell University
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Precipitates formed during the growth of manganite thin films by pulsed laser deposition have been an obstacle for fabricating high quality devices incorporating these ferromagnetic metals. In order to analyze the nature of these precipitates, we have investigated their spectroscopic and structural properties by scanning transmission electron microscopy. For LaMnO3 films, crystallites of Mn3O4 are found to segregate out from stoichiometric films to accommodate a net cation off-stoichiometry during growth. By tuning the laser spot conditions, these precipitates can be eliminated.
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