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@INPROCEEDINGS{Meven:1030415,
      author       = {Meven, Martin and Redhammer, G. and Rettenwander, D. and
                      Ceretti, M. and Paulus, W. and Bosak, A.},
      title        = {{S}ingle {C}rystal {D}iffraction {S}tudies on {E}nergy
                      {S}torage {M}aterials with {H}ot {N}eutrons on {HE}i{D}i},
      reportid     = {FZJ-2024-05288},
      year         = {2024},
      abstract     = {The single crystal diffractometer HEiDi (jointly operated
                      by RWTH Aachen University and the Forschungszentrum Jülich)
                      at the research neutron source FRM II at the Heinz
                      Maier-Leibnitz Zentrum (MLZ) in Garching offers a broad
                      spectrum of thermal and hot neutrons, high neutron flux,
                      high resolution and a large access to reciprocal space, low
                      absorption and high sensitivity for light elements.
                      Especially its last features makes HEiDi a valuable tool for
                      extended studies on different materials and components
                      relevant for applications in the field of energy research.
                      Lithium is one of the most important ingredients of nowadays
                      batteries. Further improvements depend on better components,
                      e.g. those that offer higher energy densities and higher
                      operational reliability. Solid-state electrolytes, based on
                      the cubic garnet Li$_6$La$_3$ZrTaO$_{12}$ (LLZTO), are
                      potential candidates and have become the focus of research
                      recently. A comprehensive T dependent study using single
                      crystal neutron and x-ray diffraction technique (2.5 K ≤ T
                      ≤ 873 K) delivers new insights in the mobility and
                      pathways of the Li ions in this complex structure [1, 2,
                      3].Another important example are oxygen diffusion pathways
                      in various brownmillerites, like Nd$_2$NiO$_{4+\delta}$ or
                      Pr$_2$NiO$_{4+\delta}$ [4]. The introduction of interstitial
                      oxygen affects not only the electric and structural
                      properties but also the magnetic ones of these compounds.
                      Within a joint French-German project (DFG funding ME
                      3488/2-1), a special mirror furnace –built at the FRM II
                      –allowed detailed studies on the oxygen behavior up to
                      1300 K and in various sample atmospheres with different
                      oxygen concentrations and pressures. Other neutron studies
                      studies were performed down to ~2.5K inorder to get insights
                      into the relationship between (weak) oxygen doping and
                      magnetic order [5, 6] These experiments were combined with
                      elastic and inelastic synchrotron radiation to gain a
                      complete overview of the oxygen (dis)orders and phase
                      transitions.[1] G.J. Redhammer, M. Meven, S. Ganschow, G.
                      Tippelt and D. Rettenwander; Acta Cryst. B 77(2021),
                      123-130; https://doi.org/10.1107/S2052520620016145[2] G.J.
                      Redhammer, P. Badami, M. Meven, S. Ganschow, S. Berendts, G.
                      Tippelt, and D. Rettenwander; ACS Appl. Mater. Interfaces
                      (2021), 350–359; https://doi.org/10.1021/acsami.0c16016[3]
                      M. Philipp, B. Gadermaier, P. Posch, I. Hanzu, S. Ganschow,
                      M. Meven, D. Rettenwander, G.J. Redhammer, H. Martin R.
                      Wilkening; Adv. Mater. Interfaces 7 (2020), 200450;
                      https://doi.org/10.1002/admi.202000450[4] C. Hareesh, M.
                      Ceretti, P. Papet, A. Bosak, M. Meven and W. Paulus;
                      Crystals 13(12), 1670;
                      https://doi.org/10.3390/cryst13121670[5] S.R. Maity, M.
                      Ceretti, L. Keller, J. Schefer, M. Meven, E. Pomjakushina,
                      and W. Paulus; Phys. Rev. Materials 5 (2021), 014401;
                      https://doi.org/10.1103/PhysRevMaterials.5.014401[6] S.R.
                      Maity, M. Ceretti, L. Keller, J. Schefer, T. Shang, E.
                      Pomjakushina, M. Meven, D. Sheptyakov, A. Cervellino and W.
                      Paulus; Phys. Rev. Materials 3 (2019), 083604;
                      https://doi.org/10.1103/PhysRevMaterials.3.083604},
      month         = {Jun},
      date          = {2024-06-04},
      organization  = {MLZ Conference 2024: Neutrons for
                       Energy Storage, Munich (Germany), 4 Jun
                       2024 - 7 Jun 2024},
      subtyp        = {After Call},
      cin          = {JCNS-FRM-II / MLZ / JARA-FIT / JCNS-2 / JCNS-4},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-2-20110106 /
                      I:(DE-Juel1)JCNS-4-20201012},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4) / 632 - Materials – Quantum, Complex and
                      Functional Materials (POF4-632) / DFG project 431446509 -
                      Untersuchung der Sauerstoff-Diffusionsmechanismen in
                      Pr2NiO4+d unter in situ-Bedingungen mittels
                      Neutronenstreuung: Wechselwirkung zwischen Struktur und
                      Gitterdynamik (431446509)},
      pid          = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632 /
                      G:(GEPRIS)431446509},
      experiment   = {EXP:(DE-MLZ)HEIDI-20140101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1030415},
}