Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-10T10:17:12.108Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Garanakis, I., Dederichs, P.H. and Papanikolaou, N., Phys. Rev. B66, 174429 (2002).10.1103/PhysRevB.66.174429Google Scholar
2. Kogachi, M., Tadachi, N., Kohata, H. and Ishibashi, H., Intermetallics 13, 535 (2005).Google Scholar
3. Kogachi, M., Tadachi, N. and Nakanishi, T., Intermetallics 14, 742 (2006).10.1016/j.intermet.2005.11.006Google Scholar
4. Webster, P.J., J. Phys. Chem. Solids 32, 1221 (1973).Google Scholar
5. Kogachi, M., Minamigawa, S. and Nakahigashi, K., Acta Metall. Mater. 40, 1113 (1992).10.1016/0956-7151(92)90410-GGoogle Scholar
6. Kogachi, M., Tanahashi, T., Shirai, Y. and Yamaguchi, M., Scripta Mater. 34, 243 (1996).10.1016/1359-6462(95)00514-5Google Scholar
7. Bardos, D.I., J. Appl. Phys., 40, 1371 (1969).Google Scholar
8. Shiga, M., AIP Conf. Proc. (Magnetism and Magnetic Materials), 18, 463 (1973).Google Scholar
9. Miura, Y., Nagao, K. and Shirai, M., Phys. Rev. B69, 144413 (2004).10.1103/PhysRevB.69.144413Google Scholar
10. Picozzi, S. and Continenza, A., Phys. Rev. B69, 094423 (2004).Google Scholar