arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2602.23562cond-mat.mes-hall
收藏

基于复合材料的磁电缩放器件具有大输出电压

Composite based magnetoelectric scaled devices with large output voltages

Imec;KU Leuven, Departement Elektrotechniek(荷语鲁汶大学电气工程系)

Emma Van Meirvenne, Aude Brinkmann-Hornbogen, Bart Soree, Christoph Adelmann, Florin Ciubotaru

AI总结:

本研究通过优化磁电复合器件的尺寸和材料,实现大输出电压,利用应变传递机制提升压电层性能。

摘要:

在本工作中,我们研究了在从磁性基态旋转到垂直配置过程中,纳米尺度复合器件中直接磁电(ME)效应产生的差分电压生成。这些复合器件由一个磁致伸缩铁磁层和一个压电层组成,通过应变机械耦合。使用在COMSOL Multiphysics中开发的有限元方法(FEM)模型,我们对应变传递机制和产生的电压生成进行了全面分析。在此,系统地考察了尺寸和材料参数对器件性能的影响。我们的结果表明,在缩放尺寸下存在两种不同的应变传递机制,其中器件长宽比和磁性状态都决定了影响应变传递到压电层的主要机制。此外,我们观察到当柱体面积减小时,表面夹持的影响减小。我们还发现,使用更刚性的电极或夹持层可以增强应变传递到压电层。最后,我们得出结论,具有大磁弹耦合常数或大泊松比的磁致伸缩材料可能在小尺寸下显著增加输出电压。本研究为设计缩放磁电柱体时的尺寸和材料选择提供了见解,旨在生成大输出电压。我们展示了在缩放器件中可以实现超过200 mV的输出电压,突显了这些结构在微电子应用中的潜力。

英文摘要:

In this work, we investigate the differential voltage generation arising from the direct magnetoelectric (ME) effect in nanoscale composite devices upon magnetization rotation from the magnetic ground state to an out-of-plane (OOP) configuration. These composite devices comprise a magnetostrictive ferromagnetic layer and a piezoelectric layer, mechanically coupled through strain. Using a finite element method (FEM) model, developed in COMSOL Multiphysics, we provide a comprehensive analysis of strain transfer mechanisms and resulting voltage generations. Here, the influence of dimensional and material parameters on the device performance is systematically examined. Our results indicate the presence of two distinct strain transfer mechanisms at scaled dimensions, where the device aspect ratio and the magnetic state both determine the dominant mechanism influencing the strain transfer to the piezoelectric layer. Moreover, we observed that the influence of surface clamping diminished as the pillar area was reduced. We also saw that the strain transfer to the piezoelectric layer can be enhanced by using stiffer electrodes or clamping layers. Lastly, we concluded that magnetostrictive materials with large magnetoelastic coupling constants or large Poisson ratios may strongly increase the output voltage at small dimensions. This study provides insight in the dimension and material selection when designing scaled ME pillars, with the aim of generating large output voltages. We showed that output voltages exceeding 200 mV can be achieved in scaled devices, underscoring the potential of these structures for integration into microelectronic applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑