We study the effects of an applied magnetic field on mobile charges in a composite beam of piezoelectric semiconductor and piezomagnetic layers. The macroscopic theory of piezoelectrics/piezomagnetics and the drift–diffusion theory of semiconductors are used. A one-dimensional model for beam bending is derived. An analytical solution is obtained, showing that bending and axial polarization develops in the beam under the applied magnetic field and that the mobile charges move to screen the effective polarization charges. Hence the composite beam exhibits an interaction between the applied magnetic field and semiconduction. The results are useful in piezotronic devices interacting with magnetic fields.

我们研究了施加的磁场对压电半导体和压电层复合束中的移动电荷的影响。使用了压电/压电的宏观理论和半导体的漂移扩散理论。推导了梁弯曲的一维模型。获得了一种解析解，表明在施加的磁场下，光束中会发生弯曲和轴向极化，并且移动电荷移动以屏蔽有效极化电荷。因此，复合束在施加的磁场和半导体之间表现出相互作用。该结果在与磁场相互作用的压电器件中很有用。