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@ARTICLE{Ho:875385,
      author       = {Ho, Ping-Luen and Yu, Chu-Ping and Zhang, Qiqi and Song,
                      Kyung and Buban, James P. and Choi, Si-Young and
                      Dunin-Borkowski, Rafal E. and Mayer, Joachim and Tai,
                      Nyan-Hwa and Zhu, Jing and Jin, Lei and Zhong, Xiaoyan},
      title        = {{E}ffect of cation ratio and order on magnetic circular
                      dichroism in the double perovskite {S}r2{F}e1+{R}e1-{O}6},
      journal      = {Ultramicroscopy},
      volume       = {193},
      issn         = {0304-3991},
      address      = {Amsterdam},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-01996},
      pages        = {137 - 142},
      year         = {2018},
      abstract     = {Superexchange-based magnetic coupling of the two B-site
                      cations in rock-salt-ordered double perovskite oxides is
                      extremely sensitive to the cation ratio and degree of order.
                      However, as a result of the limited spatial resolution of
                      most magnetic characterization techniques, it is challenging
                      to establish a direct relationship between magnetic
                      properties and structure in these materials, including the
                      effects of elemental segregation and cation disorder. Here,
                      we use electron energy-loss magnetic chiral dichroism
                      together with aberration-corrected electron microscopy and
                      spectroscopy to record magnetic circular dichroism (MCD)
                      spectra at the nm scale, in combination with structural and
                      chemical information at the atomic scale from the very same
                      region. We study nanoscale phases in ordered Sr2[Fe][Re]O6,
                      ordered Sr2[Fe][Fe1/5Re4/5]O6 and disordered
                      Sr[Fe4/5Re1/5]O3 individually, in order to understand the
                      role of cation ratio and order on local magnetic coupling.
                      When compared with ordered Sr2[Fe][Re]O6, we find that
                      antiferromagnetic Fe3+-O2−-Fe3+superexchange interactions
                      arising from an excess of Fe suppress the MCD signal from Fe
                      cations in ordered Sr2[Fe][Fe1/5Re4/5]O6, while dominant
                      Fe3+-O2−-Fe3+antiferromagnetic coupling in disordered
                      Sr[Fe4/5Re1/5]O3 leads to a decrease in MCD signal down to
                      the noise level. Our work demonstrates a protocol that can
                      be used to correlate crystallographic, electronic and
                      magnetic information in materials such as Sr2Fe1+xRe1-xO6,
                      in order to provide insight into structure-property
                      relationships in double perovskite oxides at the atomic
                      scale.},
      cin          = {ER-C-1 / PGI-5},
      ddc          = {570},
      cid          = {I:(DE-Juel1)ER-C-1-20170209 / I:(DE-Juel1)PGI-5-20110106},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30005323},
      UT           = {WOS:000444834300016},
      doi          = {10.1016/j.ultramic.2018.06.009},
      url          = {https://juser.fz-juelich.de/record/875385},
}