Title: Petr Machovec: Microstructure of Hexagonal LuFeO3 Thin Epitaxial Layers
Number: 20/22
Status: Closing date exceeded
Begin: Thursday, 28.04. 2022, 14:00
Tutor: Václav Holý, Milan Dopita
Location: Lecture room F2, MFF UK Ke Karlovu 5, first floor


Nano Seminar

Thursday, 28.4. 2022, 14.00

Lecture room F2, MFF UK Ke Karlovu 5

Petr Machovec

Department of Condensed Matter Physics, Charles University, Faculty of Mathematics and Physics, Ke Karlovu 5, 121 16, Prague 2

Microstructure of Hexagonal LuFeO3 Thin Epitaxial Layers

The structure and microstructure of hexagonal LuFeO3 epitaxial layers grown by pulsed laser deposition on sapphire with and without platinum interlayer and Yttria-stabilized zirconia substrates were investigated by means of x-ray reflectivity and high-resolution x-ray diffraction (reciprocal space mapping. Using model of x-ray scattering on mosaic layers we determined size, size distribution, and misorientation of mosaic blocks and microstrain from reciprocal space maps of several symmetrical and asymmetrical reciprocal lattice points. We revealed that the layer of h-LuFeO3 grown directly on the sapphire substrate tends to have bigger mosaic blocks with larger misorientation. Moreover, blocks with two different out-of-plane lattice parameters microstrain were observed. The presence of platinum interlayer causes a decrease in size and dramatic decrease of misorientation of mosaic blocks. The size of mosaic blocks in the h-LuFeO3 layer deposited on Yttria-stabilized zirconia is similar to that of the layer deposited directly on the sapphire substrate, but the misorientation of the mosaic blocks is significantly lower.

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