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.
Revised: April 16, 2020 |
Published: January 13, 2017
Citation
Chambers S.A., T.C. Droubay, T.C. Kaspar, I.H. Nayyar, M.E. McBriarty, S.M. Heald, and D.J. Keavney, et al. 2017.Electronic and Optical Properties of a Semiconducting Spinel (Fe2CrO4).Advanced Functional Materials 27, no. 9:Article No. 1605040.PNNL-SA-121344.doi:10.1002/adfm.201605040