Cryocoolers 8 pp 685-694 | Cite as

New Ternary Magnetic Lanthanide Regenerator Materials for the Low-Temperature Stage of a Gifford-McMahon (G-M) Cryocooler

  • K. A. GschneidnerJr.
  • V. K. Pecharsky
  • M. Gailloux


Four new alloys Er6Ni2Sn, Er6Ni2Pb, Er6Ni2(Sn0.75Ga0.25), and 50:50 Er6Ni2Sn/Er3Ni have been prepared and studied as potential candidate materials for the lower temperature stage of Gifford-McMahon (G-M) cryocooler. The important criteria for developing magnetic cryocooler alloys are described and these were utilized to discover the four materials. The low temperature heat capacities of the four alloys in the as cast and heat treated conditions were measured from 1.5 to 40K, along with those of Pr3Ni, Nd3Ni and Er3Ni. The field dependence of the heat capacity of Er6Ni2Sn, and the magnetic susceptibility of Er6Ni2Pb and Er6Ni2(Sn0.75Ga0.25) indicate that the Er6Ni2X phases order ferrimagnetically. The heat capacities of Er6Ni2X alloys are significantly higher than that of Pb below 18K, and that of Er3Ni between 9 and 18K. These results indicate that they would be good cryogenic regenerator materials for a G-M cryocooler which operates down to ~10K, and would provide greater cooling power than Pb for the same size cryocooler.


Heat Capacity Regenerator Material Lanthanide Series High Heat Capacity Paramagnetic Curie Temperature 
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.
    Buschow, K.H.J., Olijhoek, J.F. and Miedema, A.R., “Extremely Large Heat Capacities between 4 and 10K”, Cryogenics, vol. 15, (1975), pp. 261–264.CrossRefGoogle Scholar
  2. 2.
    Sahashi, M, Tokai, Y., Kuriyama, T., Nakagome, H., Li, R., Ogawa, M. and Hashimoto, T., “New Magnetic Material R3T System with Extremely Large Heat Capacities Used as Heat Regenerators”, Adv. Cryogenic Eng, vol. 35, (1990), pp. 1175–1182.Google Scholar
  3. 3.
    Kuriyama, T., Hakamada, R., Nakagome, H., Tokai, Y., Sahashi, M., Li, R., Yoshida, O., Matsumoto, K. and Hashimoto, T., “High Efficient Two-stage GM Refrigerator with Magnetic Material in the Liquid Helium Temperature Region”, Adv. Cryogenic Eng, vol. 35, (1990), pp. 1261–1269.Google Scholar
  4. 4.
    Hashimoto, T., Ogawa, M. and Li, R., “Recent Advance in Magnetic Regenerator Material”, Cryogenic, vol. 30, [September supplement] (1990), pp. 192–198.Google Scholar
  5. 5.
    Bouvier, M., Lethuillier, P. and Schmitt, D., “Specific Heat in Some Gadolinium Compounds. I. Experimental”, Phys. Rev. B, vol. 43, (1991), pp. 13137–13144.ADSCrossRefGoogle Scholar
  6. 6.
    Takahashi, A., Tokai, Y., Sahashi, M. and Hashimoto, T., “Specific Heat of a Regenerator Material Er3Ni”, Jpn. J. Appl. Phys., vol. 33, (1994), pp. 1023–1026.ADSCrossRefGoogle Scholar
  7. 7.
    Tang, J. and Gschneidner, K.A., Jr., “The Influence of Crystalline Electric Field on the Low Temperature Properties of CeCd11”, J. Magn. Magn. Mater., vol. 75, (1988), pp. 355–360.ADSCrossRefGoogle Scholar
  8. 8.
    Joseph, R.R., Gschneidner, K.A., Jr. and Hungsberg, R.E., “Low-Temperature Heat Capacity of LaPt2 and CePt2 and the Magnetic Susceptibility of CePt2”, Phys. Rev. B, vol. 5, (1972), pp. 1878–1885.ADSCrossRefGoogle Scholar
  9. 9.
    Meyer, H. and Smith, P. L., “The Heat Capacities of Seven Rare-Earth Ethylsulfates at Low Temperature”, J. Phys. Chem. Solids, vol. 9, (1959). pp. 285–295.ADSCrossRefGoogle Scholar
  10. 10.
    Deenadas, C., Thompson, A.W., Craig, R.S. and Wallace, W.E., “Low Temperature Heat Capacities of Laves Phase Lanthanide-Aluminum Compounds”, J. Phys. Chem. Solids, vol. 32, (1971), pp. 1853–1866.ADSCrossRefGoogle Scholar
  11. 11.
    Sichevych, O.M., Komarovskaya, L.P., Gryn’, Yu.N., Yarmolyuk, Ya.P. and Skolozdra, R.V., “The Crystal Structure and Magnetic Properties of R6Ga(Co, Ni)2 and R6SnNi2 Compounds (R = Rare Earth Metal)”, Ukr. Fiz. Zhur., vol. 29, (1984), pp. 1342–1345. [In Ukrainian].Google Scholar
  12. 12.
    Skolozdra, R.V., Komarovskaya, L.P. and Koretskaya, O.E., “”, IV All-Union Conference on Phase Diagrams of Metallic Systems. Collected Abstracts, Moscow, 1982, Nauka, Moscow (1982), p. 99. [In Russian]. Original article not available. Cited after: Gladyshevsky, E.I., Bodak, O.I. and Pecharsky, V.K., “Phase Equilbria and Crystal Chemistry in Ternary Rare Earth Systems with Metallic Elements”, Gschneidner, K.A., Jr. and Eyring, L., Eds., Handbook on the Physics and Chemistry of Rare Earths, vol. 13 (1990), pp. 1-190.Google Scholar
  13. 13.
    Gladyshevsky, R.E., Gryn’, Yu.N. and Yarmolyuk, Ya.P., “The Crystal Structure of R6GaCo2 Compounds (R = Y, Tb, Dy, Ho, Er, Tm, Lu)”, Dopov. Akad. Nauk Ukr. RSR., Ser. A, No. 2, (1983), pp. 67–70. [In Ukrainian].Google Scholar
  14. 14.
    Ikeda, K., Gschneidner, K.A., Jr., Beaudry, B.J. and Atzmony, U., “Heat Capacity in Superconducting and Normal-state LaSx (1.333 ≤ x ≤ 1.500) Compounds”, Phys. Rev. B, vol. 25, (1982), pp. 4604–4617.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

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

Personalised recommendations