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Title: Synthesis, Structure, and Spectroscopy of Epitaxial EuFeO3 Thin Films

Rare earth iron perovskites RFeO3, where R is a rare earth cation, exhibit an array of magnetic, catalytic, optical and electrochemical properties. Here we study EuFeO3 films synthesized by molecular beam epitaxy in order to better understand the optical properties of ferrites. A combination of x-ray diffraction, x-ray reflectivity, Rutherford backscattering spectroscopy, and scanning transmission electron microscopy were used to characterize the film structure and cation composition. X-ray absorption spectroscopy confirms the nominal 3+ valence states of Eu and Fe. The optical properties of EuFeO3 were investigated using variable angle spectroscopic ellipsometry between the phonon energies of 1.25 to 5 eV. We find that EuFeO3 is a semiconductor with an onset of optical absorption near 2.5 eV. The absorption spectrum of EuFeO3 is blue-shifted with respect to LaFeO3 films, a result that is attributed to the structural differences of the two materials.
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Publication Date:
OSTI Identifier:
Report Number(s):
47862; KP1704020
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystal Growth & Design, 15(3):1105-1111
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org:
Country of Publication:
United States
Environmental Molecular Sciences Laboratory