Czechoslovak Journal of Physics

, Volume 46, Supplement 4, pp 2161–2162 | Cite as

Comparative study of the third-order magnetic susceptibility and the specific heat of antiferromagnetic MnBr2·4H2O

  • M. A. Chernikov
  • E. Felder
  • H. R. Ott
Magnetism (Experiment)

Abstract

We report a comparative study of the third-order magnetic susceptibility χ3(T) and of the specific heatC p (T) of an antiferromagnetically ordering MnBr2·4H2O single crystal withT N=2.13 K. The dominant feature in χ3(T) is a positive singularity nearT N. The critical exponents of χ3 are negative both above and belowT N. On the contrary, the critical behaviour of the magnetic contributionC m(T) to the specific heatC p(T) is logarithmic belowT N and may be described by a large and positive critical exponent definitely exceeding the value of 0.3 aboveT N. These results suggest that the critical behaviour of χ3(T) of a moderately anisotropic antiferromagnet is qualitatively different from that ofC m (T).

Keywords

Critical Exponent Critical Behaviour Magnetic Contribution GdVO4 Primary Coil 
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References

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    L. P. Gor'kov, private communication (1992).Google Scholar
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    C. Domb and J. A. Wyles, J. Phys. C (Solid St. Phys.)2, 2435 (1969) and references therein.CrossRefADSGoogle Scholar

Copyright information

© Institute of Physics, Acad. Sci. CR 1996

Authors and Affiliations

  • M. A. Chernikov
    • 1
  • E. Felder
    • 1
  • H. R. Ott
    • 1
  1. 1.Laboratorium für FestkörperphysikEidgenössische Technische Hochschule-HönggerbergZürichSwitzerland

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