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@ARTICLE{Maity:903600,
      author       = {Maity, Sumit Ranjan and Ceretti, Monica and Keller, Lukas
                      and Schefer, Jürg and Meven, Martin and Pomjakushina,
                      Ekaterina and Paulus, Werner},
      title        = {{I}nterdependent scaling of long-range oxygen and magnetic
                      ordering in nonstoichiometric {N}d$_2${N}i{O}$_{4.10}$},
      journal      = {Physical review materials},
      volume       = {5},
      number       = {1},
      issn         = {2475-9953},
      address      = {College Park, MD},
      publisher    = {APS},
      reportid     = {FZJ-2021-05254},
      pages        = {014401},
      year         = {2021},
      abstract     = {Hole doping in Nd2NiO4.00 can be achieved either by
                      substituting the trivalent Nd atoms by bivalent
                      alkaline-earth metals or by oxygen doping, yielding
                      Nd2NiO4+δ. While the alkaline-earth-metal atoms are
                      statistically distributed on the rare-earth sites, the extra
                      oxygen atoms in the interstitial lattice remain mobile down
                      to ambient temperature and allow complex ordering scenarios
                      depending on δ and T. Thereby the oxygen ordering, usually
                      setting in far above room temperature, adds an additional
                      degree of freedom on top of charge, spin, and orbital
                      ordering, which appear at much lower temperatures. In this
                      study, we investigated the interplay between oxygen and spin
                      ordering for a low oxygen doping concentration, i.e.,
                      Nd2NiO4.10. Although the extra oxygen doping level remains
                      rather modest with only 1 out of 20 possible interstitial
                      tetrahedral lattice sites occupied, we observed by
                      single-crystal neutron diffraction the presence of a complex
                      three-dimensional (3D) modulated structure related to oxygen
                      ordering already at ambient, the modulation vectors being
                      ±2/13a*±3/13b*, ±3/13b*±2/13b*, and ±1/5a*±1/2c*, and
                      satellite reflections up to fourth order.
                      Temperature-dependent neutron-diffraction studies indicate
                      the coexistence of oxygen and magnetic ordering below
                      TN≃48 K, the wave vector of the Ni sublattice being
                      k=(100). In addition, magnetic satellite reflections adapt
                      exactly the same modulation vectors as found for the oxygen
                      ordering, evidencing a unique coexistence of 3D modulated
                      ordering for spin and oxygen ordering in Nd2NiO4.10.
                      Temperature-dependent measurements of magnetic intensities
                      suggest two magnetic phase transitions below 48 and 20 K,
                      indicating two distinct onsets of magnetic ordering for the
                      Ni and Nd sublattices, respectively.},
      cin          = {JCNS-FRM-II / JARA-FIT / MLZ / JCNS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      $I:(DE-82)080009_20140620$ / I:(DE-588b)4597118-3 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-6G4},
      experiment   = {EXP:(DE-MLZ)HEIDI-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000604570700001},
      doi          = {10.1103/PhysRevMaterials.5.014401},
      url          = {https://juser.fz-juelich.de/record/903600},
}