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SUMMARY:2023 Spring Graduate Colloquium Series: Balaram Regmi
DESCRIPTION;ENCODING=QUOTED-PRINTABLE:<b><center>2023 Spring Graduate Colloquium Series<p>
Balaram Regmi<p>
Single-crystal high entropy perovskite oxide epitaxial films</b></center><p>
Examples of single-crystal epitaxial thin films of a high entropy perovskite oxide are synthesized. Pulsed laser deposition is used to grow the configurationally disordered ABO3perovskite Ba(Zr0.2Sn0.2Ti0.2Hf0.2Nb0.2)O3 epitaxially on SrTiO3 and MgO substrates. X-ray diffraction and scanning transmission electron microscopy demonstrate that the films are single phase with excellent crystallinity and atomically abrupt interfaces to the underlying substrates. Atomically resolved electron-energy-loss spectroscopy mapping shows a uniform and random distribution of all B-site cations. The ability to stabilize perovskites with this level of configurational disorder offers new possibilities for designing materials from a much broader combinatorial cation pallet while providing a fresh avenue for fundamental studies in strongly correlated quantum materials where local disorder can play a critical role in determining macroscopic properties.<p>
Keywords: Epitaxially, B-site cations,spectroscopy<p>
<b><center>For more information contact: Dr. Anzhong Wang (254) 710-2276
LOCATION:Baylor Sciences Building, Room E.231
DTSTART;TZID=US_Central:20230324T153500
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