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@INPROCEEDINGS{Xu:1003869,
      author       = {Xu, Yifan and Hussein, Mai and BEDNARSKI-MEINKE, CONNIE and
                      QDEMAT, ASMAA and TOBER, STEFFEN and KENTZINGER, EMMANUEL
                      and RÜCKER, ULRICH and PETRACIC, OLEG and BRÜCKEL, THOMAS},
      title        = {{I}n-situ monitoring of the electric-field induced
                      switching process in {F}e3{O}4/{N}b:{STO} heterostructures},
      reportid     = {FZJ-2023-01285},
      year         = {2023},
      abstract     = {The ability to tune magnetic oxide phases via redox
                      reactions across their heterointerfaces could lead to useful
                      spintronic and memristive device applications. By applying a
                      small electric field, oxidation/reduction occurs at the
                      heterointerface and leads to a reversible phase transition.
                      In this talk, we present the preparation and
                      characterization of epitaxial (001)Fe3O4 thin films grown on
                      TiO2-terminated (001)Nb:STO via pulsed laser deposition.
                      Using magnetometry, we detect the Verwey transition; a
                      strong indicator of the oxygen content in the Fe3O4 films.
                      We observe the disappearance in the Verwey transition
                      temperature with an applied positive electric field. This
                      could be explained by oxygen diffusion through the interface
                      which then leads to a reversible phase transition from
                      Fe3O4(magnetite) to γ-Fe2O3(maghemite). Using ex-situ x-ray
                      diffraction, we observe an additional Fe3O4(111) peak in the
                      out-of-plane direction influenced by the applied voltage.
                      Interestingly, by grazing-incidence small-angle X-ray
                      scattering, we observe a change in the magnetite domain size
                      for the sample after applying the electric field.},
      month         = {Mar},
      date          = {2023-03-26},
      organization  = {DPG-Frühjahrstagung der Sektion
                       Kondensierte Materie (SKM), Dresden
                       (Germany), 26 Mar 2023 - 31 Mar 2023},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-HBS},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-HBS-20180709},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1003869},
}