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@PHDTHESIS{Gkdemir:908801,
      author       = {Gökdemir, Hatice},
      title        = {{M}agnetoelectric {I}nteractions in {M}ultiferroic
                      {T}hin-film {H}eterosystems and {N}anostructures},
      volume       = {256},
      school       = {Univ. Duisburg},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2022-02846},
      isbn         = {978-3-95806-635-9},
      series       = {Schriften des Forschungszentrums Jülich Reihe
                      Schlüsseltechnologien / Key Technologies},
      pages        = {x, 140},
      year         = {2022},
      note         = {Dissertation, Univ. Duisburg, 2021},
      abstract     = {Electric-write magnetic-read memory-based devices replace
                      conventionalhard-disk drives, since they o↵er an advantage
                      of reduced power consumptionfor writing. The next generation
                      spintronic application building blocksare multiferroic
                      materials, which combine and couple magnetic and
                      electricproperties. It was therefore of great importance to
                      investigate the still unexploredphenomena, such as
                      electronic structure changes at the interfacesof these
                      heterosystems. Within the scope of this thesis, we have
                      attemptedto develop artificial multiferroic (AM) materials
                      with desired ferroic properties.We studied two model
                      systems:• (i) BaTiO3/La0.7Sr0.3MnO3/SrTiO3 (BTO/LSMO/STO)
                      and• (ii) Fe/BaTiO3 (Fe/BTO).Firstly, epitaxially grown
                      BTO and LSMO films on STO grown by thepulsed laser
                      deposition (PLD) technique were investigated. Magnetic
                      properties,surface morphologies, and crystal phases of the
                      as-received sampleswere characterized. To study charge
                      anisotropy and coupling of two ferroicorders of the AM
                      heterostructures element specifically we performedX-ray
                      absorption spectroscopy (XAS) measurements with polarized
                      X-raysat UE56/1 − SGM FZ J¨ulich Beamline at BESSY-II
                      synchrotron facility.Secondly, the Fe/BTO system is
                      investigated using a cutting-edge spectromicroscopictool,
                      namely the low energy electron microscope/X-ray
                      photoelectronemission microscope (LEEM/XPEEM) located at the
                      same endstationat BESSY-II. LEEM, Auger electron
                      spectroscopy (AES) and lowenergy electron di↵raction
                      (LEED) were used to study the ferroelectric
                      domains,cleanness and termination of the BTO(001) surface,
                      respectively.Spatially resolved electronic structure of
                      ferroelectric domains were demonstratedfor the first time
                      using X-ray linear dichroism (XLD)-PEEM contrastmechanism.
                      In−situ and ex−situ Fe growth by e-beam evaporationon
                      BTO(001) was established. To present the interplay between
                      ferroelectricityand inverse magnetostrictive behavior in
                      Fe/BTO, X-ray magneticcircular dichroism (XMCD)- and
                      XLD-PEEM experiments were conducted},
      cin          = {PGI-6},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {5221 - Advanced Solid-State Qubits and Qubit Systems
                      (POF4-522)},
      pid          = {G:(DE-HGF)POF4-5221},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/908801},
}