journal article·2022-12-27

“Oxygen Sponge” Dynamics in Topotactic SrCo1–xFexO3−δ

Hien Thi Dieu Nguyen, Yu Wang, Peggy Schoenherr, Pankaj Sharma, Jan Seidel

ACS Applied Electronic Materials· Volume 4· Issue 12
Publisher page

Abstract

Topotactic transitions in complex oxides provide a pathway for the design of electronic, optical, and magnetic material properties. Here, we report on epitaxial perovskite (PV)- and brownmillerite (BM)-phase SrCo0.66Fe0.34O3−δ thin films that were grown on SrTiO3, LaAlO3, and DyScO3 single-crystal substrates by pulsed laser deposition. Temperature-dependent X-ray diffraction is used to investigate structural transitions and properties of the fabricated thin films and their associated “oxygen sponge” dynamics. We find that the topotactic phase transition between PV and BM phases in this material can be controlled in a wide temperature range between 200 and 325 °C and shows that it can be strongly tuned by the respective strain state and oxygen environment. Our findings reveal crucial insights for the control of topotactic transformations and are interesting for utilizing SrCo0.66Fe0.34O3−δ in redox devices and electrochromic applications.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials · Ferroelectric and Piezoelectric Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, University of New South Wales Australia, Sydney, New South Wales2052, Australia

ARC Centre of Excellence in Future Low-Energy Electronics Technologies, University of New South Wales Sydney, Sydney, New South Wales2052, Australia

Mark Wainwright Analytical Centre, University of New South Wales, Sydney, New South Wales2052Australia

College of Science and Engineering, Flinders University, Bedford Park, Adelaide, South Australia5042, Australia

Funding

MacDiarmid Institute for Advanced Materials and Nanotechnology · Australian Research Council · ARC Centre of Excellence in Future Low Energy Electronics Technologies (FLEET)

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