论文部分内容阅读
From the measurements of the ac susceptibility of SrRuO3, we determine the critical temperature Tc = 159.7 ±0.2 K and critical exponents δ＝ 2.50 + 0.15 (from the critical isotherm) or δ＝ 3.17 ± 0.20 (from magnetization versus magnetic field at Curie temperature), γ + β＝ 1.50 ± 0.05 (from the temperature dependence of the inteal field of the crossover line), and γ＝ 0.96 ± 0.05 (from the temperature dependence of the susceptibility along the same line). These exponent values are very close to those predicted by the mean field model.