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@ARTICLE{Cao:902642,
      author       = {Cao, Lei and Petracic, Oleg and Wei, Xian-Kui and Zhang,
                      Hengbo and Duchoň, Tomáš and Gunkel, Felix and
                      Koutsioumpas, Alexandros and Zhernenkov, Kirill and
                      Rushchanskii, Konstantin Z. and Hartmann, Heinrich and
                      Wilhelm, Marek and Li, Zichao and Xie, Yufang and He, Suqin
                      and Weber, Moritz L. and Veltruská, Kateřina and
                      Stellhorn, Annika and Mayer, Joachim and Zhou, Shengqiang
                      and Brückel, Thomas},
      title        = {{M}igration {K}inetics of {S}urface {I}ons in
                      {O}xygen‐{D}eficient {P}erovskite {D}uring {T}opotactic
                      {T}ransitions},
      journal      = {Small},
      volume       = {17},
      number       = {51},
      issn         = {1613-6810},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2021-04437},
      pages        = {2104356},
      year         = {2021},
      abstract     = {Oxygen diffusivity and surface exchange kinetics underpin
                      the ionic, electronic, and catalytic functionalities of
                      complex multivalent oxides. Towards understanding and
                      controlling the kinetics of oxygen transport in emerging
                      technologies, it is highly desirable to reveal the
                      underlying lattice dynamics and ionic activities related to
                      oxygen variation. In this study, the evolution of oxygen
                      content is identified in real-time during the progress of a
                      topotactic phase transition in La0.7Sr0.3MnO3-δ epitaxial
                      thin films, both at the surface and throughout the bulk.
                      Using polarized neutron reflectometry, a quantitative depth
                      profile of the oxygen content gradient is achieved, which,
                      alongside atomic-resolution scanning transmission electron
                      microscopy, uniquely reveals the formation of a novel
                      structural phase near the surface. Surface-sensitive X-ray
                      spectroscopies further confirm a significant change of the
                      electronic structure accompanying the transition. The
                      anisotropic features of this novel phase enable a distinct
                      oxygen diffusion pathway in contrast to conventional
                      observation of oxygen motion at moderate temperatures. The
                      results provide insights furthering the design of solid
                      oxygen ion conductors within the framework of topotactic
                      phase transitions.},
      cin          = {JCNS-2 / ER-C-2 / PGI-6 / PGI-7 / JCNS-FRM-II / PGI-1 /
                      ZEA-3 / PGI-4 / JARA-FIT},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)ER-C-2-20170209 /
                      I:(DE-Juel1)PGI-6-20110106 / I:(DE-Juel1)PGI-7-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)ZEA-3-20090406 /
                      I:(DE-Juel1)PGI-4-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {5233 - Memristive Materials and Devices (POF4-523) / 632 -
                      Materials – Quantum, Complex and Functional Materials
                      (POF4-632) / 6G4 - Jülich Centre for Neutron Research
                      (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-5233 / G:(DE-HGF)POF4-632 /
                      G:(DE-HGF)POF4-6G4},
      experiment   = {EXP:(DE-MLZ)MARIA-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {34791798},
      UT           = {WOS:000719613100001},
      doi          = {10.1002/smll.202104356},
      url          = {https://juser.fz-juelich.de/record/902642},
}