Zero-field electron-spin resonance was used to measure the spin-relaxation time above Tc in the isotropic ferromagnet EuO. These measurements show an asymptotic behavior in the reduced temperature region $t<~0.02$. The dynamic exponent z was determined for this asymptotic region to be $z=2.04(7)$. Longitudinal relaxation measurements of the kinetic coefficient in EuO of K\"otzler et al. [Solid State Commun. 26, 641 (1978)] have been reanalyzed and provide an exponent $z=1.93(10)$ in the asymptotic region. Both values of z agree with theoretical predictions for a dipolar dominated region in κq space.
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Dunlap et al. (1980) studied this question.
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