Structure of Calcium Fluoride Films Evaporated on Polished Glass Surfaces

Bannon, J.; Curnow, C. E.

doi:10.1038/161136b0

Cited by 10 publications

(1 citation statement)

References 5 publications

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“…The films deposited at 200 and 300 • C have random orientation with a slight preference for [111] out-of-plane orientation. These observations are consistent with earlier reports on the temperature dependent texture formation of CaF 2 on glass substrates under normal incidence [26], where it was observed that at T = 105 • C, the preferential texture was [220] and at T 200 • C, the texture was [111]. Figure 7(a) shows the x-ray intensity versus 2θ spectra of the third set of CaF 2 samples at α = 70 • and T = 100-400 • C. At T = 100 • C, the film has a dominant [111] out-of-plane orientation.…”

Section: Temperature Dependent Biaxial Texture Formationsupporting

confidence: 94%

Morphology and texture evolution of nanostructured CaF₂films on amorphous substrates under oblique incidence flux

Gaire

Snow²,

Chan³

et al. 2010

Nanotechnology

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The morphology and biaxial texture of vacuum evaporated CaF(2) films on amorphous substrates as a function of vapour incident angle, substrate temperature and film thickness were investigated by scanning electron microscopy, x-ray pole figure and reflection high energy electron diffraction surface pole figure analyses. Results show that an anomalous [220] out-of-plane texture was preferred in CaF(2) films deposited on Si substrates at < 200 °C with normal vapour incidence. With an increase of the vapour incident angle, the out-of-plane orientation changed from [220] to [111] at a substrate temperature of 100 °C. In films deposited with normal vapour incidence, the out-of-plane orientation changed from [220] at 100 °C to [111] at 400 °C. In films deposited with an oblique vapour incidence at 100 °C, the texture changed from random at small thickness (5 nm) to biaxial at larger thickness (20 nm or more). Using first principles density functional theory calculation, it was shown that [220] texture formation is a consequence of energetically favourable adsorption of CaF(2) molecules onto the CaF(2)(110) facet.

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Section: Temperature Dependent Biaxial Texture Formationsupporting

confidence: 94%