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Updated: Jan 30, 2026

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
Published on: May 29, 2018
Direct study of structural phase transformation in single crystalline bulk and thin film BaFe2As2
A Pukenas1, P Chekhonin1, M Meißner2
1Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany.
Abstract:
The ternary iron arsenide compound BaFe2As2 exhibits a structural phase transition from tetragonal to orthorhombic at a temperature of about 140 K. The twin lamellae arising below this transition temperature were studied in undoped single crystalline bulk and epitaxial thin film samples using electron backscatter diffraction in a scanning electron microscope equipped with a helium cryostat. Applying this technique on bulk single crystals a characteristic twin lamella size in the range of 0.1 μm up to a few μm was observed. In contrast, in epitaxially strained thin films the phase transition is not observed at temperatures above 19 K.
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