TY - JOUR
T1 - Magnetite Fe3-δO4
T2 - A stoichiometry and structure analysis of MBE grown thin films using NO2 as the oxidising source
AU - Voogt, F. C.
AU - Hibma, T.
AU - Smulders, P. J.M.
AU - Niesen, L.
AU - Fujii, T.
AU - Van Der Heijden, P. A.A.
AU - Van De Veerdonk, R. J.M.
AU - Van Der Zaag, P. J.
PY - 1997/3/1
Y1 - 1997/3/1
N2 - Epitaxial single crystalline films of iron oxides have been grown on MgO(100) substrates by means of MBE. Natural Fe or 57Fe was evaporated from alumina crucibles, and oxidised simultaneously with a dosed flux of NO2. The resulting oxide layers have been characterised in situ with RHEED, LEED, XPS, and AES. RHEED intensity oscillations, observed during deposition of the oxides, indicate a layer-by-layer growth for all substrate temperatures between 373 and 673 K. A stoichiometry analysis with CEMS, performed ex situ, shows that it is straightforward to prepare both the stable magnetite Fe3O4 and the metastable maghemite γ-Fe2O3 phases. Moreover, also all solid solutions in between these two extreme phases, i.e. Fe3-δO4 with 0<δ<1/3, could be formed. Ion beam channelling has been used to examine the epitaxy of the films. It was found that the films grow coherent on MgO(100).
AB - Epitaxial single crystalline films of iron oxides have been grown on MgO(100) substrates by means of MBE. Natural Fe or 57Fe was evaporated from alumina crucibles, and oxidised simultaneously with a dosed flux of NO2. The resulting oxide layers have been characterised in situ with RHEED, LEED, XPS, and AES. RHEED intensity oscillations, observed during deposition of the oxides, indicate a layer-by-layer growth for all substrate temperatures between 373 and 673 K. A stoichiometry analysis with CEMS, performed ex situ, shows that it is straightforward to prepare both the stable magnetite Fe3O4 and the metastable maghemite γ-Fe2O3 phases. Moreover, also all solid solutions in between these two extreme phases, i.e. Fe3-δO4 with 0<δ<1/3, could be formed. Ion beam channelling has been used to examine the epitaxy of the films. It was found that the films grow coherent on MgO(100).
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M3 - Article
AN - SCOPUS:4244078922
SN - 1951-6355
VL - 7
SP - C1-601-C1-602
JO - European Physical Journal: Special Topics
JF - European Physical Journal: Special Topics
IS - 1
ER -