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| Home > Publications database > Polymorphous GdScO$_{3}$ as high permittivity dielectric |
| Home > Publications database > Polymorphous GdScO$_{3}$ as high permittivity dielectric |
| Journal Article | FZJ-2015-05367 |
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2015
Elsevier
Lausanne
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Please use a persistent id in citations: doi:10.1016/j.jallcom.2015.08.135
Abstract: Four different polymorphs of GdScO3 are assessed theoretically and experimentally with respectto their suitability as a dielectric. The calculations carried out by density functional theory reveallattice constants, band gaps and the energies of formation of three crystal phases. Experimentallyall three crystal phases and the amorphous phase can be realized as thin films by pulsed laserdeposition using various growth templates. Their respective crystal structures are confirmed byx-ray diffraction and transmission electron microscopy reflecting the calculated lattice constants.X-ray photoelectron spectroscopy unveils the band gaps of the different polymorphs of GdScO3which are above 5 eV for all films demonstrating good insulating properties. From capacitancevoltage measurements, high permittivities of up to 27 for hexagonal GdScO3 are deduced.
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