A generalized presentation of multi-caloric effects based on exterior derivative theory and its applications  

作　　者：Jun Yin 

机构地区：[1]School of Materials Science and Engineering,Nankai University,Tianjin 300350,China [2]School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China

出　　处：《Communications in Theoretical Physics》2024年第8期156-163,共8页理论物理通讯（英文版）

基　　金：Supported by National Science Foundations of China No. 12004195。

摘　　要：The emerging concept of multi-caloric effects, introduced in 2010, entails the application of multiple interplay fields to a thermodynamic system. While multi-caloric effects are the main focus of experimental endeavors, theoretical considerations fall short of providing a thorough understanding. This paper introduces a comprehensive presentation on multi-caloric effects,employing the method and theory of exterior derivative formations. It addresses every aspect of thermodynamic systems, showcasing its applicability to multi-caloric materials(both singlephase and multi-phase materials), and its adaptability to different scenarios(either in single or multiple force fields). The formulation of Maxwell relationships, characterized by their generality and universality, enables a clear prediction in entropy and temperature, facilitating a distinct identification between independent and interdependent contributions from multi-caloric effects. These insights hold significant importance in designing and developing specialized thermodynamic materials, optimizing functional performances and exploring innovative mechanisms.

关 键 词：multicaloric effects Maxwell relations isothermal entropy adiabatic temperature 

分 类 号：O414.1[理学—理论物理]