Magnetoelectric (ME) composites with ferromagnetic and ferroelectric phases show a strong coupling between the magnetic and electric subsystems that occurs through mechanical strain. Such composites are suitable for applications such as transducers that convert magnetic and electric energies. An important issue that needs to be considered is the magnetic-to-electric energy conversion efficiency. For applications under high power, energy transduction requires a high mechanical stability that minimizes the loss during conversion. Here, the high drive mechanical stability of Mn-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) crystals has been enhanced by external magnetic field when bonded to Fe-rich Metglas foils. External field modulation stabilizes the mechanical quality factor under high power drive. A magnetoelectric gyrator was then made that had an excellent power conversion efficiency of $\eta ={92}$ %, but which also had a dramatically decreased size as compared to similar gyrators made of “hard” Pb(Zr,Ti)O3 (PZT) ceramics. The findings provided an approach to optimizing the size-weight-power space of ME gyrators for power converters.

中文翻译：

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压电式锰掺杂 PMN-PT/Metglas 磁电回转器：以更小的尺寸提高功率效率

具有铁磁和铁电相的磁电 (ME) 复合材料显示出通过机械应变发生的磁子系统和电子系统之间的强耦合。这种复合材料适用于诸如转换磁能和电能的换能器之类的应用。需要考虑的一个重要问题是磁电能转换效率。对于高功率应用，能量转换需要高机械稳定性，以最大限度地减少转换过程中的损失。在这里，当与富铁 Metglas 箔结合时，Mn 掺杂的 Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) 晶体的高驱动机械稳定性已通过外部磁场增强。外场调制在高功率驱动下稳定机械品质因数。然后制造了一种磁电回转器，其具有出色的功率转换效率 $\eta ={92}$%，但与由“硬”Pb(Zr,Ti)O3 制成的类似回转器相比，其尺寸也显着减小（ PZT) 陶瓷。研究结果提供了一种优化用于功率转换器的 ME 回转器的尺寸-重量-功率空间的方法。