Mixed oxide surfaces: ultrathin films of Ca(sub x)Mg(sub 1-x)O

Article Abstract:

A study examined the use of concurrent vacuum co-epitaxy of a quite unstable mixed oxide with a very slow phase separation below 1100 K. In particular, this research focused on the use of low-temperature epitaxy of Ca and Mg under oxidizing conditions to generate mixed thin film oxides. The mixed oxides developed as single crystals across a wide array of compositions and behaved in a manner that is not a linear combination of the two pure oxide systems. Lastly, intimate atomic-scale mixing was found until flashed above 1100 K.

Thin films, Oxides, Surface chemistry, Magnesium oxide, Lime, Calcium oxides

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Ferroelectricity in water ice

Article Abstract:

A study was conducted to analyze ferroelectricity in water ice. Partially proton-ordered ice I was determined from the vapor phase and was assumed to be metastable. Ice changes from amorphous to crystalline correlated with decreases in the deposition. The study was carried out in an ultrahigh vacuum changer supporting a base pressure of 2x10(super -10) Torr. Results indicated a slight bulk ferroelectricity in vapor-deposited water that could grow metastably during growth resulting from the asymmetric solid-vacuum interface.

Usage, Water, Vapor-plating, Vapor deposition, Ferroelectric crystals

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Reply to comment on "Ferroelectricity in Water Ice"

Article Abstract:

The authors analyze Whitworth's comments on their work and report failure to produce strongly proton-ordered ices using templating effects. Results indicate that there may be no orientation of the first layer or that the rules are broken.

United States, Chemistry, Physical and theoretical, Physical chemistry, Protons

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