In a search for effective giant magnetoelectric coupling: Magnetically induced elastic resonance in Ni-Mn-Ga/P(VDF-TrFE) composites
In a search for effective giant magnetoelectric coupling: Magnetically induced elastic resonance in Ni-Mn-Ga/P(VDF-TrFE) composites
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DOI：
10.1016/j.apmt.2022.101682
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发表时间：
2022-12
影响因子：
8.3
通讯作者：
P. Martins;A. Lima;V. A. L'vov;Nélson Pereira;P. Sratong-on;H. Hosoda;V. Chernenko;S. Lanceros‐Méndez
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文献类型：
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作者：
P. Martins;A. Lima;V. A. L'vov;Nélson Pereira;P. Sratong-on;H. Hosoda;V. Chernenko;S. Lanceros‐Méndez
聚（偏氟乙烯-三氟乙烯）（P（VDF-TrFE））是一种适用于机电和磁电（ME）系统的压电聚合物。Ni-Mn-Ga合金表现出与其马氏体型结构转变相关的巨磁弹性响应，伴随着明显的体积变化。同时，在包含Ni-Mn-Ga颗粒（10重量%）的集合的薄膜复合物中，分布在P（VDF-TrFE）压电聚合物中，它们确保了ME效应的前所未有的共振放大。因此，在0.2 Oe的交流驱动磁场和1300 Oe的直流偏置磁场下，实验观察到了6.05 V·cm-1· Oe-1的巨磁效应系数。通过磁致伸缩颗粒的体积磁致伸缩和压电聚合物基体的共振弹性振荡，从理论上解释了所提出的ME响应放大的物理机制。
Poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) is a piezoelectric polymer suitable for applications in electromechanical and magnetoelectric (ME) systems. Ni-Mn-Ga alloys exhibit a giant magnetoelastic response related to their structural transformations of martensitic type, accompanied by noticeable volume changes. Together, in a thin film composite containing an ensemble of Ni-Mn-Ga particles (10 wt.%) distributed in the P(VDF-TrFE) piezopolymer, they ensure an unprecedented resonance amplification of the ME effect. Thus, a giant value of ME coefficient of 6.05 V·cm−1· Oe−1under AC magnetic drive field of 0.2 Oe and DC bias field of 1300 Oe is experimentally observed and discussed. The physical mechanism of the proposed ME response amplification has been explained theoretically through the volume magnetostriction of the magnetostrictive particles and resonant elastic oscillation of the piezoelectric polymer matrix.