Abstract
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.
Highlights
Piezoelectric materials may be dielectrics or semiconductors
Based on the analytical solution in the previous section, the coupled fields are calculated and examined below. n-type ZnO is chosen as the piezoelectric semiconductor layer, while the two identical piezomagnetic layers are either CoFe2 O4 or Terfenol-D
In order to reveal the dependence of the electron concentration perturbation on the material combinations and the thickness ratio h/c between the piezomagnetic layers and piezoelectric combinations and the thickness ratio h/c between the piezomagnetic layers and piezoelectric semiconductor layer, we rewrite Equation (54) as semiconductor layer, we rewrite Equation (54) as q
Summary
Piezoelectric materials may be dielectrics or semiconductors. In piezoelectric semiconductors, mechanical fields interact with mobile charges through the electric fields accompanying the mechanical fields produced via piezoelectric couplings. Recently, various piezoelectric semiconductor materials and structures have been synthesized, such as fibers, tubes, belts, spirals, and films using the so-called third-generation semiconductors, such as ZnO and MoS2 , which are piezoelectric [2] These materials have great potentials for broad applications in electronics and phototronics in the form of single structures or arrays [3,4], sensors [5], electro- and photochemical applications [6], optoelectronics [7], and nanogenerators [8,9]. The deformation produces electric polarization and motion or redistribution of mobile charges in the piezoelectric semiconductor [10] This effect has been explored for applications in nanogenerators [11,12], optical. The macroscopic macroscopic theories for semiconductors piezoelectric semiconductors and piezomagnetics are in summarized theories for piezoelectric and piezomagnetics are summarized
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