均匀磁化磁介质麦氏关系的推演及其等磁场、等磁化热容量比较

Derivation of Maxwell's Relation of Magnetic Medium With Uniform Magnetization and Comparison of Equal Magnetic Field and Equal Magnetized Heat Capacity

摘要: 从忽略和考虑磁介质的体积变化两种条件入手, 推演了均匀磁化磁介质系统的8种麦氏关系。结合简单系统的热容量概念, 讨论了均匀磁化磁介质系统的等磁场热容量和等磁化热容量的物理意义。最后, 采用雅可比行列式进一步讨论了两种热容量的差值问题。

Abstract: Eight types of Maxwell's relations for a homogeneous magnetized magnetic medium system are derived by neglecting and considering the volume change of the magnetic medium. Combined with the concept of heat capacity of a simple system, the physical significance of the equal magnetic field heat capacity and the equal magnetizing heat capacity of a homogeneous magnetized magnetic medium system is discussed. Finally, the difference between the two heat capacities mentioned above is further discussed by using the Jacobian determinant.