High surface stability of magnetite on bi-layer Fe<SUB>3</SUB>O<SUB>4</SUB>/Fe/MgO(0 0 1) films under 1 MeV Kr<SUP>+</SUP> ion irradiation
作者: N-T H Kim-NganM KrupskaA G BaloghP MalinskyA Mackova
作者单位: 1Nanostructure Laboratory, Institute of Physics, Pedagogical University, Podchorazych 2, 30 084 Kraków, Poland
2Institute of Materials Science, Technische Universität Darmstadt, Petersenstr. 23, 64287 Darmstadt, Germany
3Nuclear Physics Institute, The Academy of Sciences of the Czech Republic, v.v.i., 25 068 Rez, Czechia
4Faculty of Science, Department of Physics, J.E. Purkinje University, Ceske Mladeze 8, 400 96 Usti nad Labem, Czechia
刊名: Advances in Natural Sciences: Nanoscience and Nanotechnology, 2017, Vol.8 (4)
来源数据库: Institute of Physics Journal
DOI: 10.1088/2043-6254/aa84e2
原始语种摘要: We investigate the stability of the bi-layer Fe3O4/Fe(0 0 1) films grown epitaxially on MgO(0 0 1) substrates with the layer thickness in the range of 25–100 nm upon 1 MeV Kr+ ion irradiation. The layer structure and layer composition of the films before and after ion irradiation were studied by XRR, RBS and RBS-C techniques. The interdiffusion and intermixing was analyzed. No visible change in the RBS spectra was observed upon irradiation with ion fluence below 1015 Kr cm−2. The bi-layer structure and the stoichiometric Fe3O4 layer on the surface were well preserved after Kr+ ion irradiation at low damage levels, although the strong intermixing implied a large interfacial (Fe x O y...) and (Fe, Mg)O y layer respective at Fe3O4–Fe and Fe–MgO interface. The high ion fluence of 3.8 × 1016 Kr cm−2 has induced a complete oxidization of the buffer Fe layer. Under such Kr fluence, the stoichiometry of the Fe3O4 surface layer was still preserved indicating its high stability. The entire film contains Fe x O y -type composition at ion fluence large than 5.0 × 1016 Kr cm−2.
全文获取路径: IOP  (合作)

  • layer 
  • SUP 供给
  • films 薄膜
  • stability 稳定性
  • surface 
  • irradiation 照射
  • intermixing 混合
  • magnetite 磁铁矿
  • grown 生长
  • fluence 积分通量