期刊
APPLIED PHYSICS LETTERS
卷 97, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3481365
关键词
antiphase boundaries; defect states; ferrimagnetic materials; magnetic thin films; nickel compounds; nucleation; pulsed laser deposition; transmission electron microscopy
资金
- ONR [N00014-09-1-0119]
Thin films of NiFe2O4 have been deposited on various substrates using pulsed laser deposition and the defect structures investigated by transmission electron microscopy. Owing to the simultaneous nucleation of cation-disordered sites during the nonequilibrium growth, the NiFe2O4 films exhibit antiphase domains of similar to 20 nm, irrespective of the substrate symmetry. For growth on isostructural spinel substrates, the density of antiphase appears to decrease with decreasing lattice mismatch. Aberration corrected high resolution transmission electron microscopy reveals that the interchange of equivalent tetrahedral cation positions in the host oxygen sublattice as one of the possible mechanisms leading to the formation of antiphase domains. (C) 2010 American Institute of Physics. [doi:10.1063/1.3481365]
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