We study the electrical response of a multiferroic composite semiconductor fiber consisting of a piezoelectric semiconductor layer and two piezomagnetic layers under a transverse magnetic field applied locally to a finite part of the fiber. The phenomenological theory of piezomagnetic-piezoelectric semiconductors is employed. A one-dimensional model is derived for magnetically induced extension of the fiber. For open-circuit boundary conditions at the two ends of the fiber, an analytical solution is obtained from the model linearized for small carrier perturbations. The solution shows a local electric polarization and a pair of local electric potential barrier-well. When the two ends of the fiber are under a voltage, a nonlinear numerical solution shows that the potential barrier and well forbid the passage of currents when the voltage is low. The results have potential applications in piezotronic devices when magnetic fields are involved for manipulating the devices or sensing and transduction.

中文翻译：

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局部磁场下多铁复合半导体纤维的电响应

我们研究了一种由压电半导体层和两个压电层组成的多铁性复合半导体纤维在局部施加于纤维有限部位的横向磁场下的电响应。运用了压电-压电半导体的现象学理论。导出一维模型用于磁感应的光纤延伸。对于光纤两端的开路边界条件，可以从线性化的模型中获得较小载流子扰动的解析解。该解决方案显示了局部极化和一对局部势垒阱。当光纤的两端处于电压下时，非线性数值解表明，当电压低时，势垒并很好地禁止电流通过。