The paramagnetic Curie temperature ${\theta }_{\mathrm{p}}$ is a concept that describes the magnetic ordering temperature in the well-established Curie-Weiss law. Despite the successful explanations of the magnetic behavior, the anisotropy is not usually considered. Although anisotropic ${\theta }_{\mathrm{p}}$ has been reported for several layered antiferromagnetic or ferrimagnetic materials owing to the orientation-dependent exchange, in ferromagnetic systems, ${\theta }_{\mathrm{p}}$ was thought to be almost isotropic for decades, and the occasionally reported small difference has remained unexplained. In this paper, we experimentally report the anisotropic magnetization, critical temperature, and paramagnetic Curie temperature in highly anisotropic magnetic ${\mathrm{Rh}}_2\mathrm{CoSb}$ caused by a large magnetocrystalline anisotropy. The saturation magnetization along the $c$ axis is 25% larger than that along the $a$ axis. The critical temperature and paramagnetic Curie temperature along the $c$ axis are 6 and 15 K higher than those along the $a$ axis, respectively, as deduced from the Arrott plots and inverse susceptibility. A simple modification of the Curie-Weiss law was made to calculate the anisotropic ${\theta }_{\mathrm{p}}$, which well explains not only ${\mathrm{Rh}}_2\mathrm{CoSb}$, but also many other previously reported ferromagnetic materials.

中文翻译：

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高各向异性磁性赫斯勒化合物 Rh2CoSb 中的各向异性磁化强度、临界温度和顺磁性居里温度

顺磁居里温度 ${\theta }_{\mathrm{磷}}$是一个概念，它描述了行之有效的居里-魏斯定律中的磁有序温度。尽管成功地解释了磁行为，但通常不考虑各向异性。虽然各向异性${\theta }_{\mathrm{磷}}$ 已经报道了几种分层的反铁磁或亚铁磁材料由于方向依赖的交换，在铁磁系统中， ${\theta }_{\mathrm{磷}}$几十年来一直被认为几乎是各向同性的，偶尔报告的微小差异仍然无法解释。在本文中，我们通过实验报告了高各向异性磁性材料中的各向异性磁化强度、临界温度和顺磁性居里温度。${铑}_2\mathrm{钴锑}$由大的磁晶各向异性引起。饱和磁化沿$C$ 轴线比沿轴线大 25% $\mathrm{一种}$轴。临界温度和顺磁居里温度沿$C$ 轴比沿轴高 6 和 15 K $\mathrm{一种}$轴，分别是从阿罗特图和逆磁化率推导出来的。对居里-魏斯定律进行了简单的修改来计算各向异性${\theta }_{\mathrm{磷}}$，这不仅很好地解释了 ${铑}_2\mathrm{钴锑}$，但还有许多其他先前报道的铁磁材料。