Öksüzoglu, Ramis M. ; Elmali, Ayhan ; Henn, R. ; Fuess, Hartmut ; Hahn, Horst (2004)
Structural and magnetic properties of Al doped Co-Ag granular films : temperature dependence of magnetoresistance.
In: Journal of magnetism and magnetic materials, 279 (2-3)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The correlation between the structure, the magnetic and magnetotransport properties of sputter-deposited (Co90Al10)xAg100−x granular films (19⩽x⩽45) are investigated. For an (Co90Al10) content of about 28% the magnetoresistance (MR) ratio of the films reach its highest value of 6%. Al doping reduces the MR ratio in CoAg films, however, leads to a almost constant MR ratio against post annealing up to 773 K in (Co90Al10)28Ag72 granular films, although the film structure is affected by annealing, respectively. According to magnetization measurements, superparamagnetic cobalt grains in the as-deposited (Co90Al10)28Ag72 sample show after annealing up to 773 K both superparamagnetic and ferromagnetic behaviour. Annealing at 823 K causes a domain formation of large ferromagnetic grains with strong correlation.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2004 |
| Autor(en): | Öksüzoglu, Ramis M. ; Elmali, Ayhan ; Henn, R. ; Fuess, Hartmut ; Hahn, Horst |
| Art des Eintrags: | Bibliographie |
| Titel: | Structural and magnetic properties of Al doped Co-Ag granular films : temperature dependence of magnetoresistance |
| Sprache: | Englisch |
| Publikationsjahr: | August 2004 |
| Verlag: | Elsevier Science Publishing Company |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of magnetism and magnetic materials |
| Jahrgang/Volume einer Zeitschrift: | 279 |
| (Heft-)Nummer: | 2-3 |
| Kurzbeschreibung (Abstract): | The correlation between the structure, the magnetic and magnetotransport properties of sputter-deposited (Co90Al10)xAg100−x granular films (19⩽x⩽45) are investigated. For an (Co90Al10) content of about 28% the magnetoresistance (MR) ratio of the films reach its highest value of 6%. Al doping reduces the MR ratio in CoAg films, however, leads to a almost constant MR ratio against post annealing up to 773 K in (Co90Al10)28Ag72 granular films, although the film structure is affected by annealing, respectively. According to magnetization measurements, superparamagnetic cobalt grains in the as-deposited (Co90Al10)28Ag72 sample show after annealing up to 773 K both superparamagnetic and ferromagnetic behaviour. Annealing at 823 K causes a domain formation of large ferromagnetic grains with strong correlation. |
| Freie Schlagworte: | Magnetoresistance, Magnetic properties of heterostructures, Structural properties, Sputtering |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung |
| Hinterlegungsdatum: | 20 Nov 2008 08:19 |
| Letzte Änderung: | 20 Feb 2020 13:25 |
| PPN: | |
| Sponsoren: | Financial support from the Fonds Deutschen Chemischen Industrie is gratefully acknowledged. |
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