Ultraviolet Raman spectroscopy of epitaxial ScFeO$_{\mathrm{3}}$ films

Abstract

Scandium ferrite, ScFeO$_{\mathrm{3}}$ is a recently discovered multiferroic, i.e. a material that exhibits coexisting ferroelectric and magnetic ordering. 10 and 100 nm-thick ScFeO$_{\mathrm{3}}$ films grown by molecular-beam epitaxy on (0001) Al$_{\mathrm{2}}$O$_{\mathrm{3}}$ substrates have been studied by variable temperature ultraviolet Raman spectroscopy. ScFeO$_{\mathrm{3}}$ spectra at room temperature are consistent with the polar hexagonal \textit{P6}$_{3}$\textit{cm} structure. The temperature evolution of the Raman spectra of a ScFeO$_{\mathrm{3}}$ film measured in the range 10--1300 K indicate a transition to a non-polar (likely \textit{P6}$_{3}$\textit{/mmc}) phase; fitting of the temperature dependence of the Raman intensities yields a transition temperature of 900\textpm 50 K. Temperature evolution of Raman spectra indicates that there may be another structural transition at higher temperatures, around 1300 K. Raman spectroscopy results are consistent with other characterization data (x-ray diffraction, reflection high energy electron diffraction, terahertz spectroscopy).

Authors

  • Nicholas Parker

    Department of Physics, Boise State University, Boise ID 83725-1570

  • Katelyn Wada

    Department of Physics, Boise State University, Boise ID 83725-1570

  • Kathryn Hadley

    University of Idaho, Oregon State University, National Renewable Energy Laboratory, Golden, CO 80401, Cornell University, Ithaca, New York 14853, University of Florida Gainesville, FL 32611, Univ of Puget Sound, UNIST, St. Mary's University of Minnesota, Winona State University, Choice Research Group, Western Washington University, University of British Columbia - Okanagan, Center for Cancer Research, National Cancer Institute (NCI)

  • Kathryn Hadley

    University of Idaho, Oregon State University, National Renewable Energy Laboratory, Golden, CO 80401, Cornell University, Ithaca, New York 14853, University of Florida Gainesville, FL 32611, Univ of Puget Sound, UNIST, St. Mary's University of Minnesota, Winona State University, Choice Research Group, Western Washington University, University of British Columbia - Okanagan, Center for Cancer Research, National Cancer Institute (NCI)

  • Kathryn Hadley

    University of Idaho, Oregon State University, National Renewable Energy Laboratory, Golden, CO 80401, Cornell University, Ithaca, New York 14853, University of Florida Gainesville, FL 32611, Univ of Puget Sound, UNIST, St. Mary's University of Minnesota, Winona State University, Choice Research Group, Western Washington University, University of British Columbia - Okanagan, Center for Cancer Research, National Cancer Institute (NCI)

  • Kathryn Hadley

    University of Idaho, Oregon State University, National Renewable Energy Laboratory, Golden, CO 80401, Cornell University, Ithaca, New York 14853, University of Florida Gainesville, FL 32611, Univ of Puget Sound, UNIST, St. Mary's University of Minnesota, Winona State University, Choice Research Group, Western Washington University, University of British Columbia - Okanagan, Center for Cancer Research, National Cancer Institute (NCI)

  • Kathryn Hadley

    University of Idaho, Oregon State University, National Renewable Energy Laboratory, Golden, CO 80401, Cornell University, Ithaca, New York 14853, University of Florida Gainesville, FL 32611, Univ of Puget Sound, UNIST, St. Mary's University of Minnesota, Winona State University, Choice Research Group, Western Washington University, University of British Columbia - Okanagan, Center for Cancer Research, National Cancer Institute (NCI)

  • Kathryn Hadley

    University of Idaho, Oregon State University, National Renewable Energy Laboratory, Golden, CO 80401, Cornell University, Ithaca, New York 14853, University of Florida Gainesville, FL 32611, Univ of Puget Sound, UNIST, St. Mary's University of Minnesota, Winona State University, Choice Research Group, Western Washington University, University of British Columbia - Okanagan, Center for Cancer Research, National Cancer Institute (NCI)

  • Kathryn Hadley

    University of Idaho, Oregon State University, National Renewable Energy Laboratory, Golden, CO 80401, Cornell University, Ithaca, New York 14853, University of Florida Gainesville, FL 32611, Univ of Puget Sound, UNIST, St. Mary's University of Minnesota, Winona State University, Choice Research Group, Western Washington University, University of British Columbia - Okanagan, Center for Cancer Research, National Cancer Institute (NCI)

  • Dmitri Tenne

    Department of Physics, Boise State University, Boise ID 83725-1570