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Interface characterization in Pd-Fe-Al(oxide)-Fe systems using conversion electron mossbauer spectroscopy

Schmitt, H. ; Stahl, B. ; Ghafari, M. ; Hahn, Horst :
Interface characterization in Pd-Fe-Al(oxide)-Fe systems using conversion electron mossbauer spectroscopy.
In: Journal of Applied Physics, 97 (11) pp. 113902-1.
[Artikel], (2005)

Kurzbeschreibung (Abstract)

A Fe–Al(oxide)-bilayer was deposited on a thermally oxidized and Pd-buffered Si substrate. In order to elucidate the structural and magnetic properties of the insulators lower interface by Mössbauer spectroscopy, a thin math tracer was placed at the Al(oxide) interface. Conversion electron Mössbauer spectroscopy at room temperature and 30 K revealed the changes at the interface after Al deposition and its oxidation with molecular oxygen. This nuclear probe technique can resolve the different phases that appear during the different preparation steps. The magnetic hyperfine splitting and the isomer shift give information about the chemical, structural, and magnetic orders. This is important for an understanding of magnetoresistance in likewise composed tunneling magnetoresistance samples. A transmission electron microscopy image of a layered reference system Pd–Fe–Al2O3–Fe confirms the layered structure of the sample and the lower interface between Fe and Al (Al2O3).

Typ des Eintrags: Artikel
Erschienen: 2005
Autor(en): Schmitt, H. ; Stahl, B. ; Ghafari, M. ; Hahn, Horst
Titel: Interface characterization in Pd-Fe-Al(oxide)-Fe systems using conversion electron mossbauer spectroscopy
Sprache: Englisch
Kurzbeschreibung (Abstract):

A Fe–Al(oxide)-bilayer was deposited on a thermally oxidized and Pd-buffered Si substrate. In order to elucidate the structural and magnetic properties of the insulators lower interface by Mössbauer spectroscopy, a thin math tracer was placed at the Al(oxide) interface. Conversion electron Mössbauer spectroscopy at room temperature and 30 K revealed the changes at the interface after Al deposition and its oxidation with molecular oxygen. This nuclear probe technique can resolve the different phases that appear during the different preparation steps. The magnetic hyperfine splitting and the isomer shift give information about the chemical, structural, and magnetic orders. This is important for an understanding of magnetoresistance in likewise composed tunneling magnetoresistance samples. A transmission electron microscopy image of a layered reference system Pd–Fe–Al2O3–Fe confirms the layered structure of the sample and the lower interface between Fe and Al (Al2O3).

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of Applied Physics
Band: 97
(Heft-)Nummer: 11
Freie Schlagworte: alumina, palladium, iron, magnetic multilayers, Mossbauer effect, oxidation, hyperfine interactions, tunnelling magnetoresistance, transmission electron microscopy, ferromagnetic materials, magnetic thin films
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Gemeinschaftslabor Nanomaterialien
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 20 Nov 2008 08:21
Sponsoren: This work was funded in part by the Deutsche Forschungsgemeinschaft (DFG).
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