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@ARTICLE{SchmitzAntoniak:818126,
      author       = {Schmitz-Antoniak, Carolin and Schmitz, Detlef and Warland,
                      Anne and Svechkina, Nataliya and Salamon, Soma and
                      Piamonteze, Cinthia and Wende, Heiko},
      title        = {{R}eversed ageing of {F}e$_3${O}$_4$ nanoparticles by
                      hydrogen plasma},
      journal      = {Scientific reports},
      volume       = {6},
      issn         = {2045-2322},
      address      = {London},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2016-04642},
      pages        = {20897},
      year         = {2016},
      abstract     = {Magnetite (Fe3O4) nanoparticles suffer from severe ageing
                      effects when exposed to air even when they are dispersed in
                      a solvent limiting their applications. In this work, we show
                      that this ageing can be fully reversed by a hydrogen plasma
                      treatment. By x-ray absorption spectroscopy and its
                      associated magnetic circular dichroism, the electronic
                      structure and magnetic properties were studied before and
                      after the plasma treatment and compared to results of
                      freshly prepared magnetite nanoparticles. While aged
                      magnetite nanoparticles exhibit a more γ-Fe2O3 like
                      behaviour, the hydrogen plasma yields pure Fe3O4
                      nanoparticles. Monitoring the temperature dependence of the
                      intra-atomic spin dipole contribution to the dichroic
                      spectra gives evidence that the structural, electronic and
                      magnetic properties of plasma treated magnetite
                      nanoparticles can outperform the ones of the freshly
                      prepared batch.},
      cin          = {PGI-6},
      ddc          = {000},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {522 - Controlling Spin-Based Phenomena (POF3-522)},
      pid          = {G:(DE-HGF)POF3-522},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000370624300001},
      doi          = {10.1038/srep20897},
      url          = {https://juser.fz-juelich.de/record/818126},
}