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Author Ghafari, M. ♦ Gleiter, H. ♦ Sakurai, Y. ♦ Itou, M. ♦ Peng, G. ♦ Fang, Y. N. ♦ Feng, T. ♦ Hahn, H. ♦ Kamali, S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ALLOYS ♦ CURIE POINT ♦ MAGNETIC MATERIALS ♦ MAGNETIC MOMENTS ♦ MAGNETIC PROPERTIES ♦ MAGNETIZATION ♦ QUENCHING ♦ SPIN ♦ SPIN WAVES ♦ TEMPERATURE DEPENDENCE ♦ TRANSITION ELEMENTS
Abstract An amorphous alloy Co{sub 90}Sc{sub 10} 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 Co{sub 90}Sc{sub 10} 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 Co{sub 90}Sc{sub 10} 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 Co{sub 90}Sc{sub 10} 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.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-09-28
Publisher Place United States
Journal Applied Physics Letters
Volume Number 107
Issue Number 13


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