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Orientation control and self-assembled nanopyramid structure of films epitaxially grown on substrates
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) One-dimensional XRD spectra of five films grown on substrates. (b) Part of the spectra near the diffraction peak.

Image of FIG. 2.
FIG. 2.

(a) Diagram of the four possible epitaxial orientations of LFO on a STO(001) substrate. The shaded planes represent {111} planes. Also shown are the x-ray pole figures of the (111) reflections for LFO films grown under different conditions: (b) and 10 mTorr (sample A), (c) and 200 mTorr (sample D), and (d) and 200 mTorr (sample C). A fixed value of 25.3° [corresponding to the LFO(111) planes] was used to collect the data.

Image of FIG. 3.
FIG. 3.

(a) Bright field and (b) dark field plan view TEM images of the LFO film grown on a STO(001) substrate at substrate temperature and 200 mTorr oxygen partial pressure (sample C). The SAED pattern is shown in the inset of (b). The STO(100) and (010) diffraction spots are marked. The circles indicate the diffraction peaks of LFO {001} planes from the domains while the squares indicate the diffraction peaks of {100} planes from the domains. One of the domain diffraction spots was selected to record the dark field TEM image. Also shown are (c) a cross-sectional TEM image and (d) a high resolution cross-sectional TEM lattice image near the LFO film surface, including the FFT from each region.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Orientation control and self-assembled nanopyramid structure of LaFeO3 films epitaxially grown on SrTiO3(001) substrates