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Atomic Disorder and its Relation to the Magnetic Behavior in CoFe1-xAlx Alloys

Published online by Cambridge University Press:  26 February 2011

Tetsuya Fujiwara ,
Shigeyuki Kikuchi ,
Hiroki Ishibashi  and
Mineo Kogachi
Tetsuya Fujiwara
Affiliation:
s_tetsuya.f@p.s.osakafu-u.ac.jp, Osaka Prefecture University, Department of Physical Science, Graduate School of Science, 1-1, Gakuen-cho, Naka-ku, Sakai, 599-8531, Japan
Shigeyuki Kikuchi
Affiliation:
s_kiku-shige.com@p.s.osakafu-u.ac.jp, Osaka Prefecture University, Department of Physical Science, Graduate School of Science, 1-1, Gakuen-cho, Naka-ku, Sakai, 599-8531, Japan
Hiroki Ishibashi
Affiliation:
hiroki@p.s.osakafu-u.ac.jp, Osaka Prefecture University, Department of Physical Science, Graduate School of Science, 1-1, Gakuen-cho, Naka-ku, Sakai, 599-8531, Japan
Mineo Kogachi
Affiliation:
kogachi@p.s.oskafu-u.ac.jp, Osaka Prefecture University, Department of Physical Science, Graduate School of Science, 1-1, Gakuen-cho, Naka-ku, Sakai, 599-8531, Japan
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Abstract

Atomic disorder is investigated for B2- and Heusler-phase CoFe1-xAlx alloys quenched from various temperatures by X-ray diffraction measurements. In the B2-phase region, with increase in quenching temperature, atomic disorder on the Co-site (Co-type disorder) proceeds for x=0.30 but not for x=0.70. In the Heusler-phase region (x=0.45, 0.50 and 0.55), atomic disorder between the Fe- and Al-sites (Fe-Al-type disorder) mainly proceeds. A relation between the magnetic behavior obtained in our previous work and the atomic disorder is examined. As a result, it is found that the Co-type disorder leads to a reduction of the magnetic moment in the B2-phase alloys and that the Fe-Al-type disorder does not significantly affect the magnetic behavior in the Heusler-phase alloys.

Keywords

x-ray diffraction (XRD)ferromagneticalloy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II05-15
Copyright
Copyright © Materials Research Society 2007

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References

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