Effects of magnetic-elastic anisotropy on ferrite/lead zirconate titanate (PZT)/ferrite magnetoelectric (ME) gyrators were investigated for power conversion efficiency further improvement, and a methodology was introduced by changing the direction of applied magnetic field (H_DC). Simulation by using finite element method provides a clear evolution of magnetic flux density distribution in ferrite as H_DC rotates. Consequently, enhanced ME coupling as well as power conversion efficiency (PE) was achieved under a certain angle with maximum effective magnetic field applied especially at intensive magnetic fields. Experimental results show that current (I)-voltage (V) versus directional angle (θ) between H_DC direction and longitudinal direction of ME sample and PE vs θ data can essentially track the dynamic piezomagnetic coefficient (DPMC) vs θ profile, indicating that the H_DC rotation induced anisotropic magneto-elastic variations are responsible for the eventual PE improvement. For higher H_DC = 98Oe, PE reaches its maximum of 76.5% at θ = 75˚ relative to its counterpart of 47.6% at θ = 0˚, exhibiting an approximately 1.69 times higher enhancement. Therefore, the feasibility of an efficient approach was verified by the obtained results, providing possibilities for PE further improvement and enhanced flexibilities for ME gyrator design.

研究了磁弹性各向异性对铁氧体/锆钛酸铅 (PZT)/铁氧体磁电 (ME) 回转器的影响，以进一步提高功率转换效率，并引入了一种通过改变外加磁场 ( H _DC )方向的方法。使用有限元方法进行的模拟提供了随着H _DC旋转铁氧体中磁通密度分布的清晰演变。因此，在特定角度下实现了增强的 ME 耦合以及功率转换效率 (PE)，尤其是在强磁场下施加了最大有效磁场。实验结果表明，电流 ( I )-电压 ( V ) 与方向角 ( θ）在ME样品的H _DC方向和纵向之间以及PE与θ数据之间可以基本上跟踪动态压磁系数（DPMC）与θ曲线，表明H _DC旋转引起的各向异性磁弹性变化是最终PE改善的原因。对于更高ħ _DC  = 98Oe，PE达到其最大值的76.5％在θ=  75˚相对于其的47.6％对应于θ= 0˚，表现出大约 1.69 倍的增强。因此，所获得的结果验证了一种有效方法的可行性，为 PE 进一步改进和增强 ME 回转器设计的灵活性提供了可能性。