Elsevier

Solid State Communications

Volume 108, Issue 11, 13 November 1998, Pages 863-866
Solid State Communications

Spin-glass-like behavior of ternary uranium compound U2AuSi3

https://doi.org/10.1016/S0038-1098(98)00432-3Get rights and content

Abstract

DC magnetization, specific heat and magnetic relaxation measurements are reported for a polycrystalline U2AuSi3. The temperature dependence of the magnetization shows a cusp at a characteristic temperature Tf that strongly depends on the applied magnetic field. The specific heat does not show visible singularity around Tf, ruling out the existence of the usual long range spatial magnetic order. The pronounced difference between the zero field cooled (ZFC) and the field cooled (FC) magnetization, as well as the very slow decay of the remanence indicate the occurrence of a highly irreversible frozen state below Tf. These features are the characteristics of spin glass behavior.

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Acknowledgements

We would like to thank Professor A.V. Andreev for helpful discussions.

References (12)

  • R. Pöttgen et al.

    J. Alloys Compounds

    (1993)
  • B. Chevalier et al.

    J. Alloys Compounds

    (1996)
  • Fischer, K.H. and Hertz, J.A., Spin glasses. Cambridge University Press, Cambridge, England,...
  • Moorjani, K. and Coey, J.M.D., Magnetic Glasses, p. 197. Elsevier, Amsterdam,...
  • Holtzberg, F., Tholence, J.L. and Tournier, R., in Amorphous Magnetism II, p. 155. Plenum, New York,...
  • J. Ferré et al.

    J. Appl. Phys.

    (1981)
There are more references available in the full text version of this article.

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