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High surface stability of magnetite on bi-layer Fe3O4/Fe/MgO(0 0 1) films under 1 MeV Kr+ ion irradiation

Kim-Ngan, N.-T. H. and Krupska, M. and Balogh, A. G. and Malinsky, P. and Mackova, A. :
High surface stability of magnetite on bi-layer Fe3O4/Fe/MgO(0 0 1) films under 1 MeV Kr+ ion irradiation.
[Online-Edition: https://doi.org/10.1088/2043-6254/aa84e2]
In: Advances in Natural Sciences: Nanoscience and Nanotechnology, 8 (4) 045005. ISSN 2043-6262
[Article] , (2017)

Official URL: https://doi.org/10.1088/2043-6254/aa84e2

Abstract

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 (FexOy) and (Fe, Mg)Oy 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 FexOy -type composition at ion fluence large than 5.0 × 1016 Kr cm−2.

Item Type: Article
Erschienen: 2017
Creators: Kim-Ngan, N.-T. H. and Krupska, M. and Balogh, A. G. and Malinsky, P. and Mackova, A.
Title: High surface stability of magnetite on bi-layer Fe3O4/Fe/MgO(0 0 1) films under 1 MeV Kr+ ion irradiation
Language: English
Abstract:

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 (FexOy) and (Fe, Mg)Oy 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 FexOy -type composition at ion fluence large than 5.0 × 1016 Kr cm−2.

Journal or Publication Title: Advances in Natural Sciences: Nanoscience and Nanotechnology
Volume: 8
Number: 4
Publisher: IOP Publlishing
Uncontrolled Keywords: 2.00 nanoscience, 4.10 thin film, 4.14 surface and interface
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
Date Deposited: 28 Dec 2017 12:08
DOI: 10.1088/2043-6254/aa84e2
Official URL: https://doi.org/10.1088/2043-6254/aa84e2
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