Electronic and Optical Properties of a Semiconducting Spinel (Fe 2 CrO 4 )
Abstract
Epitaxial chromium ferrite (Fe 2 CrO 4 ), prepared by state‐of‐the‐art oxygen plasma assisted molecular beam epitaxy, is shown to exhibit unusual electronic transport properties driven by the crystallographic structure and composition of the material. Replacing 1/3 of the Fe cations with Cr converts the host ferrimagnet from a metal into a semiconductor by virtue of its fixed valence (3+); Cr substitutes for Fe at B sites in the spinel lattice. By contrast, replacing 2/3 of the Fe cations with Cr results in an insulator. Three candidate conductive paths, all involving electron hopping between Fe 2+ and Fe 3+ , are identified in Fe 2 CrO 4 . Moreover, Fe 2 CrO 4 is shown to be photoconductive across the visible portion of the electromagnetic spectrum. As a result, this material is of potential interest for important photo‐electrochemical processes such as water splitting.
- Authors:
-
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab.
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1389315
- Alternate Identifier(s):
- OSTI ID: 1401506
- Grant/Contract Number:
- AC02-06CH11357; #10122
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 9; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; chromium ferrite; expitaxial film; photoelectronic properties
Citation Formats
Chambers, Scott A., Droubay, Timothy C., Kaspar, Tiffany C., Nayyar, Iffat H., McBriarty, Martin E., Heald, Steve M., Keavney, David J., Bowden, Mark E., and Sushko, Peter V. Electronic and Optical Properties of a Semiconducting Spinel (Fe 2 CrO 4 ). United States: N. p., 2017.
Web. doi:10.1002/adfm.201605040.
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. Electronic and Optical Properties of a Semiconducting Spinel (Fe 2 CrO 4 ). United States. https://doi.org/10.1002/adfm.201605040
Chambers, Scott A., Droubay, Timothy C., Kaspar, Tiffany C., Nayyar, Iffat H., McBriarty, Martin E., Heald, Steve M., Keavney, David J., Bowden, Mark E., and Sushko, Peter V. Fri .
"Electronic and Optical Properties of a Semiconducting Spinel (Fe 2 CrO 4 )". United States. https://doi.org/10.1002/adfm.201605040. https://www.osti.gov/servlets/purl/1389315.
@article{osti_1389315,
title = {Electronic and Optical Properties of a Semiconducting Spinel (Fe 2 CrO 4 )},
author = {Chambers, Scott A. and Droubay, Timothy C. and Kaspar, Tiffany C. and Nayyar, Iffat H. and McBriarty, Martin E. and Heald, Steve M. and Keavney, David J. and Bowden, Mark E. and Sushko, Peter V.},
abstractNote = {Epitaxial chromium ferrite (Fe 2 CrO 4 ), prepared by state‐of‐the‐art oxygen plasma assisted molecular beam epitaxy, is shown to exhibit unusual electronic transport properties driven by the crystallographic structure and composition of the material. Replacing 1/3 of the Fe cations with Cr converts the host ferrimagnet from a metal into a semiconductor by virtue of its fixed valence (3+); Cr substitutes for Fe at B sites in the spinel lattice. By contrast, replacing 2/3 of the Fe cations with Cr results in an insulator. Three candidate conductive paths, all involving electron hopping between Fe 2+ and Fe 3+ , are identified in Fe 2 CrO 4 . Moreover, Fe 2 CrO 4 is shown to be photoconductive across the visible portion of the electromagnetic spectrum. As a result, this material is of potential interest for important photo‐electrochemical processes such as water splitting.},
doi = {10.1002/adfm.201605040},
journal = {Advanced Functional Materials},
number = 9,
volume = 27,
place = {United States},
year = {Fri Jan 13 00:00:00 EST 2017},
month = {Fri Jan 13 00:00:00 EST 2017}
}
Web of Science
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