Journal of Materials Science

, Volume 41, Issue 17, pp 5746–5750 | Cite as

Refining the formation of nanocrystals in soft magnetic amorphous alloy via EXAFS spectroscopic analyses

  • Yong Gyu ChoiEmail author
  • Kee-Ahn Lee


The amorphous metallic alloy with the composition Fe73.5Nb3Cu1Si13.5B9 is now quite well known as FINEMET, mainly owing to its excellent magnetic properties that are supposed to be due to the formation of small nanocrystals consisting of Fe and Si, i.e., DO3 phases, during simple heat treatment [1, 2, 3]. The evolution of such nanocrystals and their effects on the magnetic properties were comprehensively described in previous reports [4, 5, 6]. With using mainly the Fe K-edge and Cu K-edge EXAFS spectra, Ayers et al. carefully studied nucleation kinetics of samples that were heat-treated at various durations [7, 8]. In particular, the role of Cu on nucleation processes in this noncrystalline metal was largely proven by experimental observations of a series of Fourier-transformed EXAFS spectra taken at the Cu K-edge of differently heat-treated samples. A key point in their nucleation model for this amorphous metal is that Cu clusters act as nucleation sites of the DO3...


Amorphous Metal EXAFS Spectrum EXAFS Oscillation Partial Radial Distribution Function FEFF8 Code 



YGC acknowledges the support of the 2004 Hankuk Aviation University Faculty Research Grant. The X-ray absorption measurements carried out at Pohang Light Source were partially subsidized by MOST and POSCO in Republic of Korea.


  1. 1.
    Yoshizawa Y, Oguma S, Yamauchi K (1988) J Appl Phys 64:6044CrossRefGoogle Scholar
  2. 2.
    Yoshizawa Y, Yamauchi K (1991) Mat Sci Eng A 113:176CrossRefGoogle Scholar
  3. 3.
    Hono K, Inoue A, Sakurai T (1991) Appl Phys Lett 58:2180CrossRefGoogle Scholar
  4. 4.
    Graf T, Hesse J, Kopcewicz M (1999) Nanostruct Mater 12:935CrossRefGoogle Scholar
  5. 5.
    Hesse J (2001) J Alloys Comp 326:205CrossRefGoogle Scholar
  6. 6.
    Mirta A, Panda AK, Rao V, Singh SR, Ramachandrarao P (2001) Appl Surf Sci 182:321CrossRefGoogle Scholar
  7. 7.
    Ayers JD, Harris VG, Sprague JA, Elam WT (1994) Appl Phys Lett 64:974CrossRefGoogle Scholar
  8. 8.
    Ayers JD, Harris VG, Sprague JA, Elam WT, Jones HN (1998) Acta Mater 46:1861CrossRefGoogle Scholar
  9. 9.
    Stern EA, Newville M, Ravel B, Yacoby Y, Haskel D (1995) Physica B 209:117CrossRefGoogle Scholar
  10. 10.
    Rehr JJ, Mustre De Leon J, Zabinsky SI, Albers RC (1991) J Am Chem Soc 113:5135CrossRefGoogle Scholar
  11. 11.
    Choi YG, Heo J, Chernov VA (1997) J Non-Cryst Solids 221:199CrossRefGoogle Scholar
  12. 12.
    Choi YG, Kim KH, Han YS, Heo J (2000) Chem Phys Lett 329:370CrossRefGoogle Scholar
  13. 13.
    Crozier ED, Rehr JJ, Ingalls R (1988) In: Koningsberger DC, Prins R (eds) X-ray absorption: principles, applications, techniques of EXAFS, SEXAFS and XANES, John Wiley & Sons, New York, p 373Google Scholar
  14. 14.
    Sobczak E, Swilem Y, Dorozhkin NN, Nietubyé R, Dlużewski P, Ślawska-Waniewska A (2001) J Alloy Comp 328:57CrossRefGoogle Scholar
  15. 15.
    Kim SH, Matsuura M, Sakurai M, Suzuki K (1993) Jpn J Appl Phys 32(Suppl. 32-2):676CrossRefGoogle Scholar
  16. 16.
    Zabinsky SI, Rehr JJ, Ankudinov A (1995) Phys Rev B 52:2995CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringHankuk Aviation UniversityGyeonggiRepublic of Korea
  2. 2.School of Advanced Materials EngineeringAndong National UniversityGyeongbukRepublic of Korea

Personalised recommendations