Electronic and Optical Properties of a Semiconducting Spinel (Fe 2 CrO 4 )

Chambers, Scott A.; Droubay, Timothy C.; Kaspar, Tiffany C.; Nayyar, Iffat H.; McBriarty, Martin E.; Heald, Steve M.; Keavney, David J.; Bowden, Mark E.; Sushko, Peter V.

doi:10.1002/adfm.201605040

Title: Electronic and Optical Properties of a Semiconducting Spinel (Fe ₂ CrO ₄ )

Journal Article · Fri Jan 13 00:00:00 EST 2017 · Advanced Functional Materials

DOI:https://doi.org/10.1002/adfm.201605040· OSTI ID:1347835

Chambers, Scott A. ^[1]; Droubay, Timothy C. ^[1]; Kaspar, Tiffany C. ^[1]; Nayyar, Iffat H. ^[1]; McBriarty, Martin E. ^[1]; Heald, Steve M. ^[2]; Keavney, David J. ^[2]; Bowden, Mark E. ^[3]; Sushko, Peter V. ^[1]

Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999 Richland WA 99354 USA
Advanced Photon Source, Argonne National Laboratory, Argonne IL 60439 USA
Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999 Richland WA 99354 USA

Epitaxial Fe2CrO4 is shown to be a ferrrimagnetic semiconductor which absorbs in the visible portion of the electromagnetic spectrum and exhibits conductivity via an unusual mechanism. Cr(III) substitutes for Fe in octahedral sites and prevents nearestneighbor B-site hopping as found in Fe3O4. Rather, ab initio modeling reveals that electron exchange between Fe(II) and Fe(III) cations at A and B sites, along with A-to- A, B-to-B site hopping over greater distances, constitute three high-resistance conduction pathways through the material.

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1347835

Report Number(s):: PNNL-SA-121344; 49306; 48341; KC0203020

Journal Information:: Advanced Functional Materials, Vol. 27, Issue 9; ISSN 1616-301X

Publisher:: Wiley

Country of Publication:: United States

Language:: English

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Chromium substituted iron oxide nanowires as affordable electrocatalysts for oxygen evolution reaction Kocabas, Serra; Cetin, Asude; Önal, Ahmet M. Journal of Nanoparticle Research, Vol. 21, Issue 7 https://doi.org/10.1007/s11051-019-4591-5	journal	June 2019
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Reversible Oxidation Quantified by Optical Properties in Epitaxial Fe ₂ CrO _4+δ Films on (001) MgAl ₂ O ₄ Scafetta, Mark D.; Kaspar, Tiffany C.; Bowden, Mark E. ACS Omega, Vol. 5, Issue 7 https://doi.org/10.1021/acsomega.9b03299	journal	February 2020

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