A better understanding of magnetoelectric (ME) energy materials with superior properties stimulates exploration of next generation of versatile energy devices with a high efficiency. Although a number of investigations have focused on developing multiferroic composite materials because of their potential in cutting-edge multifunctional devices, advances in basic research have not yet been translated into benefits for practical applications. In the present investigation, we introduce a two-phase magnetoelectric composite made of nanocrystalline FeBSi metallic ribbons (Metglas) and Mn³⁺,²⁺ acceptor doped Pb(Mg_1/3Nb_2/3)O₃-Pb(Zr,Ti)O₃ (PMN-PZT) single crystal, and great enhancements in ME coupling coefficient (α_ME ∼ 12500 V/Oe cm) with a tunable resonance frequency, current-to-voltage (I–V) conversion ratio (∼15090 V/I), as well as power conversion efficiency (η ∼ 95%) are found at the fundamental electromechanical resonance, which represent the highest values ever reported. This study also provides a fundamental understanding of the role of a figure of merit (FOM), k_ij,eff×Q_m,eff, on ME coupling performances in ferromagnetic and ferroelectric two-phase ME composite. The enhanced performances are attributed to the laser heat treatment induced Nano crystallization in Metglas, lower magnetic and dielectric loss (tan δ), and also higher mechanical quality factor (Q_m,eff) in ME composite. This research opens up the possibilities of developing ME composite materials for next-generation versatile energy and power conversion devices.

对具有优异性能的磁电（ME）能源材料的更好理解，激发了对下一代多功能能源设备的高效率探索。尽管由于其在先进的多功能设备中的潜力，许多研究都集中在开发多铁性复合材料上，但是基础研究的进展尚未转化为对实际应用的好处。在本研究中，我们介绍了一种由纳米晶FeBSi金属带（Metglas）和Mn ³⁺，2 ⁺受体掺杂的Pb（Mg _1/3 Nb _2/3）O ₃ -Pb（Zr，Ti ）制成的两相磁电复合材料O ₃（PMN-PZT）单晶，并极大改进在ME耦合系数（α _ME 〜12500 V /奥斯特厘米）用的可调谐的谐振频率，电流-电压（I-V ）转化率（〜15090 V / I ），在基本的机电共振时发现功率转换效率（η〜95 ％），这是有史以来的最高值。这项研究还提供了对品质因数（FOM）作用的基本理解，k _ij，eff ×Q _m，eff，关于铁磁和铁电两相ME复合材料的ME耦合性能。增强的性能归因于激光热处理在Metglas中引起的纳米结晶，较低的磁损耗和介电损耗（tanδ），以及ME复合材料中较高的机械品质因数（Q _m，eff）。这项研究为开发下一代多功能能量和功率转换设备的ME复合材料开辟了可能性。