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Unexpected magnetic behavior in amorphous Co90Sc10 alloy

Ghafari, M. ; Sakurai, Y. ; Peng, G. ; Fang, Y. N. ; Feng, T. ; Hahn, H. ; Gleiter, H. ; Itou, M. ; Kamali, S. (2015)
Unexpected magnetic behavior in amorphous Co90Sc10 alloy.
In: Applied Physics Letters, 107 (13)
doi: 10.1063/1.4932113
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

An amorphous alloy Co90Sc10 has been prepared by rapid quenching from the melt. The results of magnetization measurements show that this alloy has the highest Curie temperature reported for any amorphous transition metal based alloys. Furthermore, for a Co based amorphous alloy, the magnetic moment is remarkably high. Moreover, the alloy exhibits soft magnetic properties. Based on the findings, amorphous Co90Sc10 appears to be an attractive candidate for applications as a soft magnetic material. The temperature dependence of the reduced magnetization can be described by the Bloch power law. The results show that the B coefficient of the amorphous Co90Sc10 alloy, which is a measure of the rigidity of spin waves, exhibits the lowest value observed until now for any amorphous alloy and is comparable to crystalline alloys. It is found that the Sc atoms in the Co90Sc10 alloy lead to an increase of the itinerant spin moment of Co atoms, and, in contrast to this behaviour, to a decrease of the local 3d-electrons of Co.

Typ des Eintrags: Artikel
Erschienen: 2015
Autor(en): Ghafari, M. ; Sakurai, Y. ; Peng, G. ; Fang, Y. N. ; Feng, T. ; Hahn, H. ; Gleiter, H. ; Itou, M. ; Kamali, S.
Art des Eintrags: Bibliographie
Titel: Unexpected magnetic behavior in amorphous Co90Sc10 alloy
Sprache: Englisch
Publikationsjahr: 2015
Verlag: AIP Publishing
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Applied Physics Letters
Jahrgang/Volume einer Zeitschrift: 107
(Heft-)Nummer: 13
DOI: 10.1063/1.4932113
Kurzbeschreibung (Abstract):

An amorphous alloy Co90Sc10 has been prepared by rapid quenching from the melt. The results of magnetization measurements show that this alloy has the highest Curie temperature reported for any amorphous transition metal based alloys. Furthermore, for a Co based amorphous alloy, the magnetic moment is remarkably high. Moreover, the alloy exhibits soft magnetic properties. Based on the findings, amorphous Co90Sc10 appears to be an attractive candidate for applications as a soft magnetic material. The temperature dependence of the reduced magnetization can be described by the Bloch power law. The results show that the B coefficient of the amorphous Co90Sc10 alloy, which is a measure of the rigidity of spin waves, exhibits the lowest value observed until now for any amorphous alloy and is comparable to crystalline alloys. It is found that the Sc atoms in the Co90Sc10 alloy lead to an increase of the itinerant spin moment of Co atoms, and, in contrast to this behaviour, to a decrease of the local 3d-electrons of Co.

Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 02 Dez 2015 13:57
Letzte Änderung: 02 Dez 2015 13:57
PPN:
Sponsoren: The Magnetic Compton Experiments and High Energy X-Ray Diffraction (HE-XRD) Experiments have been carried out at Spring-8 with the approval of the Japan Synchrotron Radiation Research Institute (Proposal Nos.: 2015A1889 and 2015A1890).
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