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@ARTICLE{Wang:15733,
      author       = {Wang, C.H. and Baker, S.N. and Lumsden, M.D. and Nagler,
                      S.E. and Heller, W.T. and Baker, G.A. and Deen, P.D. and
                      Cranswick, L.M.D. and Su, Y. and Christianson, A.D.},
      title        = {{A}ntiferromagnetic {O}rder in {M}n{O} {S}pherical
                      {N}anoparticles},
      journal      = {Physical review / B},
      volume       = {83},
      number       = {21},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-15733},
      pages        = {214418},
      year         = {2011},
      note         = {We acknowledge useful discussions with J. Musfeldt and I.
                      Swainson. Research Work at ORNL was sponsored by the
                      Laboratory Directed Research and Development Program of
                      ORNL, and was supported by the Scientific User Facilities
                      Division Office of Basic Energy Sciences, DOE. A portion of
                      this research was conducted at the Center for Nanophase
                      Materials Sciences, which is sponsored at ORNL by the Office
                      of Basic Energy Sciences, US DOE.},
      abstract     = {We have performed unpolarized and polarized neutron
                      diffraction experiments on monodisperse 8- and 13-nm
                      antiferromagnetic MnO nanoparticles. For the 8-nm sample,
                      the antiferromagnetic transition temperature T-N (114 K) is
                      suppressed compared to that in the bulk material (119 K),
                      while for the 13-nm sample T-N (120 K) is comparable to that
                      in the bulk. The neutron diffraction data of the
                      nanoparticles is well described using the bulk MnO magnetic
                      structure but with a substantially reduced average magnetic
                      moment of 4.2 +/- 0.3 mu(B)/Mn for the 8-nm sample and 3.9
                      +/- 0.2 mu(B)/Mn for the 13-nm sample. An analysis of the
                      polarized neutron data on both samples shows that in an
                      individual MnO nanoparticle about $80\%$ of Mn ions order.
                      These results can be explained by a structure in which the
                      monodisperse nanoparticles studied here have a core that
                      behaves similar to the bulk with a surface layer which does
                      not contribute significantly to the magnetic order.},
      keywords     = {J (WoSType)},
      cin          = {PGI-4 / JCNS (München) ; Jülich Centre for Neutron
                      Science JCNS (München) ; JCNS-FRM-II / JCNS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-4-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {Grundlagen für zukünftige Informationstechnologien /
                      Großgeräte für die Forschung mit Photonen, Neutronen und
                      Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK412 / G:(DE-Juel1)FUEK415},
      experiment   = {EXP:(DE-MLZ)DNS-20140101},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000291652300002},
      doi          = {10.1103/PhysRevB.83.214418},
      url          = {https://juser.fz-juelich.de/record/15733},
}