Magnetite Fe3-δO4: A stoichiometry and structure analysis of MBE grown thin films using NO2 as the oxidizing source

F. C. Voogt; T. Hibma; P. J.M. Smulders; L. Niesen; T. Fujii; P. A.A. van der Heijden; R. J.M. van de Veerdonk; P. J. van der Zaag

Magnetite Fe_3-δO₄: A stoichiometry and structure analysis of MBE grown thin films using NO₂ as the oxidizing source

F. C. Voogt, T. Hibma, P. J.M. Smulders, L. Niesen, T. Fujii, P. A.A. van der Heijden, R. J.M. van de Veerdonk, P. J. van der Zaag

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

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 oxidized simultaneously with a dosed flux of NO₂. The resulting oxide layers have been characterized 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. Fe_3-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).

Original language	English
Pages (from-to)	601-602
Number of pages	2
Journal	Journal De Physique. IV : JP
Volume	7
Issue number	1
Publication status	Published - Mar 1 1997
Externally published	Yes
Event	Proceedings of the 1996 7th International Conference on Ferrites, ICF - Bordeaux, Fr Duration: Sep 3 1996 → Sep 6 1996

ASJC Scopus subject areas

Physics and Astronomy(all)

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Magnetite Fe_3-δO₄ : A stoichiometry and structure analysis of MBE grown thin films using NO₂ as the oxidizing source. / Voogt, F. C.; Hibma, T.; Smulders, P. J.M.; Niesen, L.; Fujii, T.; van der Heijden, P. A.A.; van de Veerdonk, R. J.M.; van der Zaag, P. J.

In: Journal De Physique. IV : JP, Vol. 7, No. 1, 01.03.1997, p. 601-602.

Research output: Contribution to journal › Conference article › peer-review

@article{30fb31dc7d0144cd9d8dd5706cacdd43,

title = "Magnetite Fe3-δO4: A stoichiometry and structure analysis of MBE grown thin films using NO2 as the oxidizing source",

abstract = "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 oxidized simultaneously with a dosed flux of NO2. The resulting oxide layers have been characterized 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).",

author = "Voogt, {F. C.} and T. Hibma and Smulders, {P. J.M.} and L. Niesen and T. Fujii and {van der Heijden}, {P. A.A.} and {van de Veerdonk}, {R. J.M.} and {van der Zaag}, {P. J.}",

year = "1997",

month = mar,

day = "1",

language = "English",

volume = "7",

pages = "601--602",

journal = "European Physical Journal: Special Topics",

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note = "Proceedings of the 1996 7th International Conference on Ferrites, ICF ; Conference date: 03-09-1996 Through 06-09-1996",

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T1 - Magnetite Fe3-δO4

T2 - Proceedings of the 1996 7th International Conference on Ferrites, ICF

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 oxidized simultaneously with a dosed flux of NO2. The resulting oxide layers have been characterized 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 oxidized simultaneously with a dosed flux of NO2. The resulting oxide layers have been characterized 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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