Wang Guolin, Liu Jinxi, Feng Wenjie, Yang Jiashi
School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China.
Hebei Key Laboratory of Mechanics of Intelligent Materials and Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China.
Materials (Basel). 2020 Jul 13;13(14):3115. doi: 10.3390/ma13143115.
In this work, we study the behavior of a composite rod consisting of a piezoelectric semiconductor layer and two piezomagnetic layers under an applied axial magnetic field. Based on the phenomenological theories of piezoelectric semiconductors and piezomagnetics, a one-dimensional model is developed from which an analytical solution is obtained. The explicit expressions of the coupled fields and the numerical results show that an axially applied magnetic field produces extensional deformation through piezomagnetic coupling, the extension then produces polarization through piezoelectric coupling, and the polarization then causes the redistribution of mobile charges. Thus, the composite rod exhibits a coupling between the applied magnetic field and carrier distribution through combined piezomagnetic and piezoelectric effects. The results have potential applications in piezotronics when magnetic fields are relevant.
在这项工作中，我们研究了由压电半导体层和两个压磁层组成的复合棒在轴向磁场作用下的行为。基于压电半导体和压磁学的唯象理论，建立了一个一维模型，并从中得到了解析解。耦合场的显式表达式和数值结果表明，轴向施加的磁场通过压磁耦合产生拉伸变形，拉伸变形再通过压电耦合产生极化，极化又导致移动电荷的重新分布。因此，复合棒通过压磁和压电效应的组合表现出外加磁场与载流子分布之间的耦合。当磁场相关时，这些结果在压电子学中有潜在应用。
