The Giant Magnetocaloric Effect in Gd5(SixGe1-x)4 Materials for Magnetic Refrigeration

  • V. K. Pecharsky
  • K. A. GschneidnerJr.
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 43)

Abstract

The Gd5(SixGe1-x)4 alloys, where 0 ≤ x ≤ 0.5, exhibit a giant magnetocaloric effect. This extremely large magnetocaloric effect should elevate magnetic refrigeration technology to new heights allowing it to become even more competitive with other existing refrigeration technologies. The temperature of the giant magnetocaloric effect is easily tunable between ~30 and ~275 K by changing the Si:Ge ratio. Furthermore, by alloying with Ga, the giant magnetocaloric effect temperature increases to ~290 K. The reversible magnetic field induced magnetic entropy change, ΔSmag, and the adiabatic temperature rise, ΔTad, for a low to moderate magnetic field change (from 0 to 2–10 T) are the largest ever observed at the corresponding Curie temperatures. The ΔSmag is 100 to 400%, and the ΔTad is 25 to 200% larger than that for the best known prototypes.

Keywords

Order Phase Transition Magnetocaloric Effect Magnetic Entropy Change Magnetic Refrigeration Magnetic Field Change 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    E. Warburg, Ann. Phys. Chem., 13:141 (1881).Google Scholar
  2. 2.
    P. Debye, Ann. Physik, 81:1154 (1926).CrossRefGoogle Scholar
  3. 3.
    W. F. Giauque, J. Am. Chem. Soc., 49:1864 (1927).CrossRefGoogle Scholar
  4. 4.
    G.V. Brown, J. Appl. Phys., 41:3613 (1976).Google Scholar
  5. 5.
    C.B. Zimm, A. Jastrab, A. Steinberg, V.K. Pecharsky, K.A. Gschneidner Jr., M.G. Osborne, and I.E. Anderson, “Description and Performance of a Sub-Room Temperature Magnetic Refrigerator”, paper JD3, presented at CEC/ICMC-97, Portland, OR, July 28-August 1, 1997.Google Scholar
  6. 6.
    Y.Z. Shao, J.K.L. Lai, and C.H. Shek. J. Magn. Magn. Mater., 163:103 (1996).CrossRefGoogle Scholar
  7. 7.
    X.Y. Liu, J.A. Barclay, R.B. Gopal, M. Földeàki, R. Chahine, T.K. Bose, P.J. Schurer, and J.L. LaCombey. Appl. Phys., 79:1630 (1996).Google Scholar
  8. 8.
    J.F. Herbst, CD. Fuerst, R.D. McMichael, J. Appl. Phys., 79:5998 (1996).CrossRefGoogle Scholar
  9. 9.
    X.X. Zhang, J. Tejada, Y. Xin, G.F. Sun, K.W. Wong, and X. Bohigas, Appl. Phys. Lett., 69:3596 (1996).CrossRefGoogle Scholar
  10. 10.
    Z.B. Guo, Y.W. Du, J.S. Zhu, H. Huang, W.P. Ding, and D. Feng, Phys. Rev. Lett., 78:1142 (1997).CrossRefGoogle Scholar
  11. 11.
    V.K. Pecharsky, J.O. Moorman, and K.A. Gschneidner, Jr., Rev. Sci. Instr., to be published in November 1997.Google Scholar
  12. 12.
    V.K. Pecharsky and K.A. Gschneidner Jr., Adv. Cryogen. Eng., 42A:423 (1996).Google Scholar
  13. 13.
    F. Holtzberg, R.J. Gambino, and T.R. McGuire, J. Phys. Chem. Solids, 28:2283 (1967).CrossRefGoogle Scholar
  14. 14.
    V.K. Pecharsky and K.A. Gschneidner, Jr., J. Alloys. Comp., in press.Google Scholar
  15. 15.
    V.K. Pecharsky and K.A. Gschneidner Jr., Phys. Rev. Lett, 78:4494 (1997).CrossRefGoogle Scholar
  16. 16.
    V.K. Pecharsky and K.A. Gschneidner Jr., Appl. Phys. Lett, 70:3299 (1997).CrossRefGoogle Scholar
  17. 17.
    V.K. Pecharsky, to be published.Google Scholar
  18. 18.
    M.P. Annaorazov, K.A. Asatryan, G. Myalikgulyev, S.A. Nikitin, A.M. Tishin, and L.A. Tyurin, Cryogenics, 32:867 (1992).CrossRefGoogle Scholar
  19. 19.
    M.P. Annaorazov, S.A. Nikitin, A.L. Tyurin, K.A. Asatryan, and A.Kh. Dovletov, J. Appl. Phys., 79:1689 (1996).CrossRefGoogle Scholar
  20. 20.
    V.K. Pecharsky and K.A. Gschneidner Jr., J. Magn. Magn. Mater., 167:L179 (1997).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • V. K. Pecharsky
    • 1
  • K. A. GschneidnerJr.
    • 1
  1. 1.Ames Laboratory and Department of Materials Science and EngineeringIowa State UniversityAmesUSA

Personalised recommendations