BaFeO3 cubic single crystalline thin film: A ferromagnetic insulator

We have synthesized BaFeOx thin films by pulsed-laser deposition followed by low temperature (200 °C) oxidation to BaFeO3. X-ray diffraction indicates that fully oxidized single crystalline BaFeO3 has been formed with a lattice parameter of 3.97 Å, the bulk stoichiometric value. The oxidation state...

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Published in:Applied physics letters 2013-09, Vol.103 (14)
Main Authors: Chakraverty, S., Matsuda, T., Ogawa, N., Wadati, H., Ikenaga, E., Kawasaki, M., Tokura, Y., Hwang, H. Y.
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cited_by cdi_FETCH-LOGICAL-c295t-94984d6fc4c497ac2eec22b5e29eecc7c9e3b787c42324fb7c6e5ab0597d51a93
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container_issue 14
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container_title Applied physics letters
container_volume 103
creator Chakraverty, S.
Matsuda, T.
Ogawa, N.
Wadati, H.
Ikenaga, E.
Kawasaki, M.
Tokura, Y.
Hwang, H. Y.
description We have synthesized BaFeOx thin films by pulsed-laser deposition followed by low temperature (200 °C) oxidation to BaFeO3. X-ray diffraction indicates that fully oxidized single crystalline BaFeO3 has been formed with a lattice parameter of 3.97 Å, the bulk stoichiometric value. The oxidation state of Fe is confirmed to be 4+ by using hard x-ray photoemission spectroscopy. A ferromagnetic ground state is found with saturation magnetization and Curie temperature of 3.2 μB/formula unit and 115 K, respectively. Unusually, for a uniform cubic ferromagnet, the films are insulating with an optical gap of ∼1.8 eV.
doi_str_mv 10.1063/1.4824210
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title BaFeO3 cubic single crystalline thin film: A ferromagnetic insulator
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