%0 Journal Article
%A Tober, Steffen
%A Creutzburg, Marcus
%A Arndt, Bjoern
%A Krausert, Konstantin
%A Mattauch, Stefan
%A Koutsioubas, Alexandros
%A Pütter, Sabine
%A Mohd, Amir Syed
%A Volgger, Lukas
%A Hutter, Herbert
%A Noei, Heshmat
%A Vonk, Vedran
%A Lott, Dieter
%A Stierle, Andreas
%T Observation of iron diffusion in the near-surface region of magnetite at 470 K
%J Physical review research
%V 2
%N 2
%@ 2643-1564
%C College Park, MD
%I APS
%M PUBDB-2020-02517
%P 023406
%D 2020
%X Experiments  are  reported,  which  allow  us  to  quantify  the  near-surface  cation  diffusion  in  (001)  orientedFe3O4single crystals at temperatures between 470 and 770 K. Thin homoepitaxial films of magnetite, grownusing isotopically labeled57Fe, were investigated by neutron reflectivity and time-of-flight secondary ion massspectrometry. By heating the thin films in high vacuum to different temperatures for a well-defined time anddetermining the57Fe distribution along the surface normal, the diffusion lengths are obtained. For the investigatedtemperature range, diffusion constants of the order of 10−20m2/s are deduced. These results are important inview of near-surface mass transport induced by oxygen chemical potential differences occurring when magnetiteis exposed to different gas atmospheres or by adsorbates.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000603643500003
%R 10.1103/PhysRevResearch.2.023406
%U https://bib-pubdb1.desy.de/record/441470