Comment on "Scaling of the anomalous Hall effect in Sr(1-x)Ca(x)RuO3"
  We argue that the scaling of the anomalous Hall effect (AHE) by Mathieu et al. [Phys. Rev. Lett. 93, 016602 (2004)] does not provide support to the interpretation of the AHE in SrRuO3 as an intrinsic effect due to Berry phase monopoles in k-space. 
Yevgeny Kats and Lior Klein