We present zero-field muon-spin-relaxation data on the ferromagnetic fluctuations near the Curie temperature of the intermetallic GdNi₅, which is a Heisenberg magnet with strong dipolar interaction. Our data show that the critical longitudinal (along the wave vector q) spin fluctuations above and below the Curie temperature are similar. They are an experimental proof of this similarity. This result is explained using the dynamical scaling theory of Halperin and Hohenberg. {} 1996 The American Physical Society.
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Yaouanc et al. (1996) studied this question.
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