淡江大學機構典藏:Item 987654321/113673
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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/113673


    Title: Electronic structure of Cr doped Fe3O4 thin films by x-ray absorption near edge structure spectroscopy
    Authors: Chi-Liang Chen;Chung-Li Dong;Kandasami Asokan;G.Chern;C.L. Chang
    Keywords: A. Thin films;B.MBE;A.Magnetite;E.X-ray absorption spectroscopy
    Date: 2018-04
    Issue Date: 2018-06-09 12:10:17 (UTC+8)
    Abstract: Present study reports the electronic structures of Cr doped Fe3O4 (Fe3-xCrxO4 (0 ≤ x ≤ 3) grown on MgO (100) substrates in the form of thin films fabricated by a plasma–oxygen assisted Molecular Beam Epitaxy (MBE). X-ray absorption near-edge structure (XANES) spectra at Cr & Fe L-, and O K-edges were used to understand the electronic structure: changes in the bonding nature, valence states, and site occupancies. Cr doping in Fe3O4 results in the change of charge transfer, crystal structure, and selective occupation of ions in octahedral and tetrahedral sites. Such change modifies the electrical and magnetic properties due to the covalency of Cr ions. The physical and chemical properties of ferrites are strongly dependent on the lattice site, ion size of dopant, and magnetic nature present at different structural symmetry of the spinel structure.
    Relation: Solid State Communications 272, p.48-52
    DOI: 10.1016/j.ssc.2018.01.011
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

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