Part I: Contributed paper
Critical dynamics of aufe reentrant ferromagnets close to the percolation threshold

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Abstract

We present inelastic neutron scattering data on critical dynamics of AuFe 18% and 16% disordered ferromagnets. The concentrations of samples were dose to the critical value (xc ∼ 15.5%) where ferromagnetism disappears and spin-glass sets in. The value of the dynamic critical exponent z for AuFe 18% (z ∼ 2.3) is close to that of a 3-D Heisenberg ferromagnet, i.e. is not affected by disorder. On the other hand, we found z ∼ 1.8 for Au_Fe 16%. This drastic decrease of the dynamic critical exponent, for a small change of the Fe concentration, suggests an influence of disorder on critical dynamics.

References (7)

  • A.B. Harris

    J. of Phys.

    (1974)
  • K. Westerhold et al.

    J. of Phys. F

    (1983)
  • J. Wosnitza et al.

    J. de Phys.

    (1989)
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