Abstract

It is shown using model calculations that Maxwell’s relation is exactly satisfied for ferromagnets with one species of magnetic atoms and for two-component ferromagnets and ferrimagnets. This allows one to confidently use this relation for calculating the main characteristics of the magnetocaloric effect in these cases. A conclusion is made that the proposed model of a ferrimagnet is self-consistent and correct from the viewpoint of thermodynamics. It is also shown that the formulas similar to Maxwell’s relation for the derivatives of magnetization and entropy for magnetic sublattices are valid only approximately.

中文翻译：

---

麦克斯韦在铁磁体和费马涅特中的关系

摘要

通过模型计算表明，对于具有一种磁性原子的铁磁体以及两组分铁磁体和亚铁磁体，麦克斯韦关系完全满足。在这种情况下，这使人们可以放心地使用这种关系来计算磁热效应的主要特征。得出的结论是，从热力学的角度来看，所提出的铁氧体模型是自洽的并且是正确的。还表明，类似于麦克斯韦关系的公式对于磁子格的磁化和熵导数仅近似有效。