Novel critical exponent of magnetization curves near the ferromagnetic   quantum phase transitions of Sr1-xAxRuO3 (A = Ca, La0.5Na0.5, and La)
  We report a novel critical exponent delta=3/2 of magnetization curves M=H^{1/delta} near the ferromagnetic quantum phase transitions of Sr1-xAxRuO3 (A = Ca, La0.5Na0.5, and La), which the mean field theory of the Ginzburg-Landau-Wilson type fails to reproduce. The effect of dirty ferromagnetic spin fluctuations might be a key. 
Y. Itoh, T. Mizoguchi and K. Yoshimura