Abstract We calculate the magnetic susceptibility in ferromagnetic metals above the Curie temperature T C using the dynamic spin fluctuation theory and make a detailed comparison with experiment. Calculation results for Fe, Co and Ni are found in good agreement with experiment over a wide temperature range. The paramagnetic Curie temperature is found 7–8% larger than the ferromagnetic one in agreement with experiment and various approximations of the Heisenberg model. We calculate the spin-density correlator to show that magnetic short-range order leads to deviation of the susceptibility from the Curie-Weiss law in the temperature interval up to 1.1–1.2 T C .

中文翻译：

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居里温度以上金属的磁化率

摘要 我们利用动态自旋涨落理论计算了居里温度TC以上铁磁金属的磁化率，并与实验进行了详细比较。在较宽的温度范围内，Fe、Co 和 Ni 的计算结果与实验非常吻合。发现顺磁性居里温度比铁磁性居里温度高 7-8%，与实验和海森堡模型的各种近似值一致。我们计算了自旋密度相关器，以表明在高达 1.1-1.2 TC 的温度区间内，磁性短程有序导致磁化率与居里-魏斯定律的偏差。