Magnetic Properties of Amorphous Gd70(Fe, Ni)30 and Dy70(Fe, Ni)30 Alloys

  • X. Y. Liu
  • J. A. Barclay
  • M. Földeàki
  • B. R. Gopal
  • R. Chahine
  • T. K. Bose
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 42)


The unique physical and mechanical properties of amorphous materials make them attractive for magnetic refrigeration applications. In an effort to develop advanced magnetic refrigerants, the magnetic properties of amorphous Gd70(Fe, Ni)30 and Dy70(Fe, Ni)30 alloys were investigated. The combination of 70 at.% Gd or Dy with different ratios of Fe and Ni produced amorphous materials with ordering temperatures covering the range of 300 K to 35 K. The coercive forces of both Gd-based and Dy-based alloys were negligible near their ordering temperatures. The magnetization properties of the alloys as a function of temperature in applied fields up to 5.6×106 A/m are presented. Magnetic entropy changes obtained from the field-dependent magnetization data are discussed. The broad nature of magnetic transitions in the amorphous alloys and its impact on the suitability of these materials as magnetic refrigerants are also discussed.


Amorphous Alloy Amorphous Material Magnetic Transition Magnetic Entropy Change Magnetic Refrigerant 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    J.A. Barclay, Passive and active magnetic regenerators, J. Alloys and Comp. 207/208: 355 (1994).CrossRefGoogle Scholar
  2. 2.
    C. Reid, J.L. Hall, S. Sarangi, and J.A. Barclay, J. Alloys and Comp. 207/208: 366 (1994)CrossRefGoogle Scholar
  3. 3.
    J.L. Hall, C.E. Reid, I.G. Spearing and J.A. Barclay, Thermodynamic considerations for the design of active magnetic regenerative refrigerators, to be published in CEC proceedings, July 1995, Columbus, Ohio.Google Scholar
  4. 4.
    H. Maeda, M. Sato, and M. Uehara, Fe-Zr amorphous alloys for magnetic refrigerants near room temperature, Trans. JIM 47: 688 (1983).Google Scholar
  5. 5.
    K. Moorjani and J.M.D. Coey, “Magnetic Glasses,” Elesvier, N.Y., (1984).Google Scholar
  6. 6.
    K. Fukamichi, Magnetic refrigerant materials, Kino Zairyo (in Japanese.) 8: 57 (1988).Google Scholar
  7. 7.
    K. Fukamichi, US Patent No. 5060478, Oct. 29, 1991.Google Scholar
  8. 8.
    X.Y. Liu, J.A. Barclay, B.R. Gopal, M. Foldeaki, R. Chahine, T.K. Bose, P.J. Schurer, and J.L. LaCombe, Thermomagnetic properties of amorphous RE70Fe30 (RE=Gd, Tb, Dy, Ho and Er) alloys, J. Appl. Phys., in press.Google Scholar
  9. 9.
    K.H.J. Buschow, Note on the magnetic properties of amorphous rare-earth nickel alloys, J. Magn. Magn. Mat. 21: 97(1980).CrossRefGoogle Scholar
  10. 10.
    K.H.J. Buschow, Magnetic properties of amorphous rare-earth-cobalt alloys, J. Appl. Phys. 51: 2795 (1980).CrossRefGoogle Scholar
  11. 11.
    K.H.J. Buschow, Magnetic properties of amorphous rare-earth-iron alloys, J. Magn. Magn. Mat. 22: 220(1981).CrossRefGoogle Scholar
  12. 12.
    T. Egami and C.D. Graham, J. Appl. Phys. 42: 1299(1971)CrossRefGoogle Scholar
  13. 13.
    K.H.J. Buschow, Amorphous alloys in: “Handbook on the Physics and Chemistry of Rare Earths” 7, K. A. Gschneidner Jr. and L. Eyring ed., North-Holland Physics Publishing, N.Y. (1984), 315.Google Scholar
  14. 14.
    S.M. Benford and G.V. Brown, T-S diagram for gadolinium near the Curie temperature, J. Appl. Phys. 52: 2110(1981)CrossRefGoogle Scholar
  15. 15.
    S. Ikeda, and Y. Ishikawa, Critical phenomena in amorphous ferromagnetic alloys 1. specific heat measurement, J. Phys. Soc. Japan 49: 950 (1980).CrossRefGoogle Scholar
  16. 16.
    A. Lienard and J.P. Rebouillat, Magnetic properties of amorphous Y-Ni alloys, J. Appl. Phys. 49: 1680 (1978).CrossRefGoogle Scholar
  17. 17.
    P. Hansen, C. Clausen, G. Much, M. Rosenkranz, and K. Witter, Magnetic and magneto-optical properties of rare-earth transition-metal alloys containing Gd, Tb, Fe, Co, J. Appl. Phys. 66: 756 (1989).Google Scholar

Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • X. Y. Liu
    • 1
  • J. A. Barclay
    • 1
  • M. Földeàki
    • 2
  • B. R. Gopal
    • 2
  • R. Chahine
    • 2
  • T. K. Bose
    • 2
  1. 1.Cryofuel SystemsUniversity of VictoriaVictoriaCanada
  2. 2.Hydrogen Research InstituteUniversité du Québec à Trois-RivièresCanada

Personalised recommendations