Effects of magnetic-elastic anisotropy on magnetoelectric gyrator with ferrite/PZT/ferrite laminate for enhancement of power conversion efficiencies
Effects of magnetic-elastic anisotropy on magnetoelectric gyrator with ferrite/PZT/ferrite laminate for enhancement of power conversion efficiencies
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DOI：
10.1016/j.jmmm.2021.168451
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发表时间：
2021-08
影响因子：
2.7
通讯作者：
Jitao Zhang;Kang Li;Qingfang Zhang;D. Filippov;Jie Wu;Jiagui Tao;Jing Chen;Liying Jiang;Lingzhi Cao;G. Srinivasan
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文献类型：
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作者：
Jitao Zhang;Kang Li;Qingfang Zhang;D. Filippov;Jie Wu;Jiagui Tao;Jing Chen;Liying Jiang;Lingzhi Cao;G. Srinivasan
为了进一步提高功率转换效率，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，并提出了一种通过改变外加磁场（HDC）方向的方法。用有限元法模拟了永磁体旋转时铁氧体内部的磁通密度分布。因此，增强的ME耦合以及功率转换效率（PE）实现在一定的角度下与最大有效磁场施加，特别是在强磁场。实验结果表明，电流（I）-电压（V）与样品的HDC方向和纵向的方向角（θ）的关系曲线和PEvs θ曲线基本上跟踪了动态压磁系数（DPMC）随θ的变化曲线，表明HDC旋转引起的各向异性磁弹性变化是导致最终PE改善的原因.当HDC = 98 Oe时，PE在θ =75 °时达到最大值76.5%，而在θ =0 °时为47.6%，增强约1.69倍。因此，一个有效的方法的可行性得到验证的结果，PE进一步改进和增强的灵活性ME回转器的设计提供了可能性。
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 (HDC). Simulation by using finite element method provides a clear evolution of magnetic flux density distribution in ferrite asHDCrotates. 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) betweenHDCdirection and longitudinal direction of ME sample and PEvs θdata can essentially track the dynamic piezomagnetic coefficient (DPMC)vs θprofile, indicating that theHDCrotation induced anisotropic magneto-elastic variations are responsible for the eventual PE improvement. For higherHDC= 98Oe, PE reaches its maximum of 76.5% atθ =75˚ relative to its counterpart of 47.6% atθ =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.