We study the electromechanical and electrical behaviors of a PN junction in a multiferroic composite fiber, consisting of a piezoelectric semiconductor (PS) layer between two piezomagnetic (PM) layers, under a transverse magnetic field. Based on the derived one-dimensional model for multiferroic composite semiconductor structures, we obtain the linear analytical solution for the built-in potential and electric field in the junction when there is no applied voltage between the two ends of the fiber. When a bias voltage is applied over the two ends of the fiber, a nonlinear numerical analysis is performed for the current–voltage relation. Both a homogeneous junction with a uniform PS layer and a heterogeneous junction with two different PSs on different sides of the junctions are studied. It is found that overall the homogeneous junction is essentially unaffected by the magnetic field, and the heterojunction is sensitive to the magnetic field with potential applications in piezotronics.

中文翻译：

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磁场对压电-压电半导体复合纤维中PN结的影响

我们研究了多铁复合纤维中 PN 结在横向磁场下的机电和电学行为，该复合纤维由两个压磁 (PM) 层之间的压电半导体 (PS) 层组成。基于导出的多铁性复合半导体结构的一维模型，我们得到了光纤两端不施加电压时结内内建电势和电场的线性解析解。当在光纤的两端施加偏置电压时，对电流-电压关系进行非线性数值分析。研究了具有均匀 PS 层的同质结和在结的不同侧面具有两种不同 PS 的异质结。