Skip to main content
SpringerLink
Log in

Magnetic phase transitions and specific heat of single crystalline cupric oxide

  • Published:
Journal of thermal analysis Aims and scope Submit manuscript

Abstract

The antiferromagnetic phase transitions in a CuO single crystal are studied by specific heat in magnetic fields up to 6T. The magnetic field dependence of the incommensurate-to-commensurate-antiferromagnetic transition atT L is found to be highly anisotropic.T L is observed to increase nonlinearly for Ba ∥c-axis, whereas, a linear reduction is observed forB a ∥b-axis. The magnetic field dependence ofT L and the jumps in magnetic susceptibility atT L are explained thermodynamically using the Clausius-Clapeyron equation.

Zusammenfassung

Anhand der spezifischen Wärme wurde in magnetischen Feldern bis zu 6T die antiferromagnetische Phasenumwandlung in einem CuO-Einkristall untersucht. Die Abhängigkeit der antiferromagnetischen Phasenumwandlung inkommensurabel/kommensurabel vom magnetischen Feld bei der TemperaturT L ist äußerst anisotrop.T L steigt fürB a ∥ c-Achse nichtlinear zu und nimmt fürB a ∥ b-Achse linear ab. Die Abhängigkeit vonT L vom magnetischen Feld und die Sprünge der magnetischen Suszeptibilität beiT L wurden unter Zuhilfenahme der Gleichung von Clausius-Clapeyron erklärt.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. B. N. Brockhouse, Phys. Rev., 94 (1954) 781.

    Google Scholar 

  2. B. X. Yang, J. M. Tranquada and G. Shirane, Phys. Rev., B 38 (1988) 174; B. X. Yanget al., Phys. Rev., B 39 (1989) 4343.

    Google Scholar 

  3. J. B. Forsyth, P. J. Brown and B. M. Wanklyn, J. Phys., C 21 (1988) 2917; P. J. Brownet al., J. Phys.: Condens. Matter, 3 (1991) 4281.

    Google Scholar 

  4. J. W. Loramet al., Europhys. Lett., 8 (1989) 263.

    Google Scholar 

  5. A. Junodet al., J. Phys.: Condens. Matter, 1 (1989) 8021.

    Google Scholar 

  6. E. Gmelin, W. Brill and T. Chattopadhyay, Thermochim. Acta, 160 (1990) 43.

    Google Scholar 

  7. E. Gmelinet al., Bull. Mater, Sci., 14 (1991) 117.

    Google Scholar 

  8. M. O'Keeffe and F. S. Stone, J. Phys. Chem. Solids, 23 (1962) 261.

    Google Scholar 

  9. T. Chattopadhyayet al., Physica, C 170 (1990) 371; M. Ainet al., Physica C 162–164 (19891279; T. Chattopadhyayet al., Proc. of Int. Conf. on Neutron Scattering, Oxford 1991 (to be published).

    Google Scholar 

  10. U. Köbler and T. Chattopadhyay, Z. Phys., B 82 (1991) 383.

    Google Scholar 

  11. P. W. Anderson, Phys. Rev., 79 (1950) 350.

    Google Scholar 

  12. E. Gmelin, Thermochim. Acta, 29 (1979) 1; ibid 110 (1987) 183; E. Gmelin and P. Rödhammer, J. Phys., E 14 (1981) 223; E. Gmelin and K. Ripka, Cryogenics, 21 (1981) 117.

    Google Scholar 

  13. B. M. Wanklyn and B. J. Garrard, J. Mater. Sci. Lett., 2 (1983) 285.

    Google Scholar 

  14. J. G. Bunting, T. Ashworth and H. Steeple, Cryogenics, 10 (1969) 385; A. J. Bevolo, Cryogenics, 12 (1974) 661.

    Google Scholar 

  15. L. J. Neuringeret al., Rev. Sci. Instrum., 42 (1971) 9.

    Google Scholar 

  16. Automatic Systems Laboratories Limited, Milton Keynes, England.

  17. See for example, T. D. Cheung, W. K. Chan, and J. S. Kouvel, Rev. Sci. Instrum., 53 (1982) 880.

    Google Scholar 

  18. For a recent report on this method, see; A. Junod, J. Phys. E: Sci. Instrum., 12 (1979) 945.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-7000, Stuttgart 80, FRG

    S. B. Ota & E. Gmelin

Authors
  1. S. B. Ota
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. E. Gmelin
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

We thank Dr. T. Chattopadhyay for providing the CuO crystal. We thank K. Ripka and the Röntgen service of the institute for technical assistance.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ota, S.B., Gmelin, E. Magnetic phase transitions and specific heat of single crystalline cupric oxide. Journal of Thermal Analysis 38, 635–640 (1992). https://doi.org/10.1007/BF01979391

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01979391

Keywords

Search

Navigation