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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