Abstract

In this study, it is demonstrated that the giant self-biased magnetoelectric (SME) response can be achieved from a center-clamped magnetostrictive–piezoelectric laminate composite by employing magnetic tip masses. An asymmetric laminate structure consisting of two different magnetostrictive layers (Metglas and nickel) with opposite signs of piezomagnetic coefficient is introduced to promote structural bending resonance, and the effect of layout change of attaching the magnetic tip masses on SME responses is systematically investigated. The highest SME effect is observed when all magnetic tip masses are loaded on the Metglas layer and their magnetization directions are normal to the Metglas surface. It is proposed that not only the parallel magnetic domains to external magnetic field but also the non-parallel magnetic domains effectively contribute to the total magnetostriction. The fabricated SME laminates exhibit giant SME voltage coefficients ranging from 14.11 to 52.35 V cm⁻¹ Oe⁻¹, depending on the direction of the fields of the tip magnets. These high SME voltage output values and their controllability are promising for precision field sensors, magnetic energy harvesters and field-tunable devices.

Graphic Abstract

中文翻译：

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预偏置磁致伸缩压电复合材料的巨大自偏置磁电效应

抽象的

在这项研究中，证明了通过采用磁性尖端质量，可以通过将中心钳位的磁致伸缩压电复合材料复合材料实现巨大的自偏置磁电（SME）响应。引入由两个不同的磁致伸缩层（Metglas和镍）组成的不对称叠层结构，压电势的符号相反，以促进结构弯曲共振，并且系统地研究了附着磁尖块的布局变化对SME响应的影响。当所有的磁性尖端质量都加载在Metglas层上并且其磁化方向垂直于Metglas表面时，观察到最高的SME效果。提出不仅与外部磁场平行的磁畴而且对非平行的磁畴有效地有助于总磁致伸缩。制成的SME层压板展现出14.11至52.35 V cm的巨大SME电压系数^-1  Oe ^-1，取决于尖端磁体的磁场方向。这些高SME电压输出值及其可控性对于精密磁场传感器，磁能采集器和磁场可调设备很有希望。

图形摘要