Journal of Biological Physics

, Volume 9, Issue 1, pp 27–34 | Cite as

The magnetocaloric effect on nickel

  • George H. Czerlinski
Article

Abstract

The original data of Weiss and Forrer are reanalyzed with the aim to obtain a precise relation between the observed temperature rise and the magnetic field strength at temperatures both above and below the Curie temperature. The application of nonlinear least squares analysis reveals that a simple dependence of the temperature rise upon the magnetic field strength does not give a good fit. A more complex expression is therefore used, employing two different exponents (as adjustable parameters) for the magnetic field strength. The exponent 2, required in the original theory of Weiss, appears only in the paramagnetic region, while exponent 3 applies in the ferromagnetic region. The second exponent, valid at high fields, is close to 1 in the ferromagnetic region and near 0.7 in the paramagnetic region (lower values are obtained for some temperatures, but are shown to be of low significance).

Keywords

Polymer Magnetic Field Nickel Statistical Physic Field Strength 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Clark, C. A.; Sucksmith, W. 1954. Proc. Roy. Soc. London,225, 147–159.Google Scholar
  2. Czerlinski, G. H. 1977. Fed. Proc.36, 693.Google Scholar
  3. Kneller, E. 1962. FERROMAGNETISMUS. Springer Verlag, Berlin.Google Scholar
  4. Knott, G. D.; Reece, D. K. 1972. Proc. ONLINE '72 Int. Conf., Brunel Univ., England,1, 497–526.Google Scholar
  5. Oliver, O. J.; Sucksmith, W. 1953. Proc. Roy. Soc. London,219A, 1–17.Google Scholar
  6. Potter, H. H. 1934. Proc. Roy. Soc. London,146A, 362–387.Google Scholar
  7. Raub, W. 1974. Fed. Proc.33, 2390–2392.Google Scholar
  8. Weiss, M. P. 1907. J. Phys.6, 661–690.Google Scholar
  9. Weiss, M. P.; Forrer, R. 1926. Ann. Phys. Paris5, 153–213.Google Scholar

Copyright information

© Forum Press, Inc 1981

Authors and Affiliations

  • George H. Czerlinski
    • 1
  1. 1.Biochemistry and Biophysics ProgramsNorthwestern UniversityChicagoUSA

Personalised recommendations