发表机构
UGC-DAE Consortium for Scientific Research; Maharaja Institute of Technology Mysore; Institute of Sciences, SAGE University; Raja Ramanna Centre for Advanced Technology（UGC-DAE 科学研究联盟; 迈索尔 Maharaja 理工学院; SAGE 大学理学院; Raja Ramanna 先进技术中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文开发了基于动态锁相的磁电耦合测量系统，用于研究PMN-PT/NFO和CFO/BTO复合材料中的应变介导磁电耦合，发现PMN-PT/NFO具有显著增强的磁电系数，凸显了磁软度和压电强度在优化耦合中的关键作用。
AI 中文摘要
本文报道了一种基于动态锁相的磁电（ME）耦合测量系统的开发及其在0.65Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_3$-0.35PbTiO$_3$/NiFe$_2$O$_4$（PMN-PT/NFO）和CoFe$_2$O$_4$/BaTiO$_3$（CFO/BTO）复合材料中研究应变介导耦合的应用。PMN-PT/NFO复合材料表现出显著增强的磁电系数（$\alpha_{\mathrm{ME}} \approx 1.85$~mV\\,mm$^{-1}$\\,Oe$^{-1}$），而CFO/BTO仅为$\approx 0.147$~mV\\,mm$^{-1}$\\,Oe$^{-1}$。反对称场依赖性和$180^\circ$相位反转证实了两种样品中耦合的应变驱动起源。PMN-PT/NFO的优异响应源于PMN-PT的高压电强度与NFO的低磁各向异性的共同作用，而CFO的高磁各向异性和BTO较弱的压电性限制了磁电输出。这些结果凸显了磁软度和压电强度在优化应变介导磁电耦合中的决定性作用。
英文摘要
This paper reports about development of a dynamic lock-in based magnetoelectric (ME) coupling measurement system and its application to investigate strain-mediated coupling in 0.65Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_3$-0.35PbTiO$_3$/NiFe$_2$O$_4$ (PMN-PT/NFO) and CoFe$_2$O$_4$/BaTiO$_3$ (CFO/BTO) composites. The PMN-PT/NFO composite exhibits a significantly enhanced ME coefficient ($α_{\mathrm{ME}} \approx 1.85$~mV\,mm$^{-1}$\,Oe$^{-1}$) compared to CFO/BTO ($\approx 0.147$~mV\,mm$^{-1}$\,Oe$^{-1}$). The antisymmetric field dependence and $180^\circ$ phase reversal confirm the strain-driven origin of coupling in both the samples. The superior response of PMN-PT/NFO arises from the combined effect of high piezoelectric strength in PMN-PT and low magnetic anisotropy of NFO, whereas the high magnetic anisotropy of CFO and weaker piezoelectricity of BTO limit the ME output. These results highlight the decisive role of magnetic softness and piezoelectric strength in optimizing strain-mediated ME coupling.
