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On the effect of polarization direction on the converse magnetoelectric response of multiferroic composite rings

机译：偏振方向对多体型复合圈逆磁电响应的影响

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摘要

The application domain of composite multiferroic materials with magnetoelectric coupling has been widening on the nano-, micro- and macro- scales. Generally, a composite multiferroic material consists of two, or more, layers of a piezoelectric material and a magnetostrictive material. In turn, the proliferation of multiferroics in more applications is accompanied by a keen focus on understanding the effect of material phases, geometry, bonding interface and arrangement of phases by performing theoretical, numerical and experimental studies to fundamentally elucidate the response. In this experimental study, a focus is given to exploit the effect of the polarization direction of the piezoelectric phase on the overall converse magnetoelectric (CME) response of a composite concentric PZT/Terfenol-D structure. Specifically, radially and axially polarized PZT rings were concentrically bonded to the outer surface of two Terfenol-D rings, respectively. It was found that the maximum, near resonance, CME coefficient of the axially-poled configuration is 443 mG V-1 when tested at 34 kHz, 80 kV m(-1) electric field and 784 Oe bias magnetic field. On the other hand, the near resonance CME value for the radially- poled configuration remained nearly constant at 281.9. +/-. 5.3 mG V-1 between bias magnetic fields of 532 Oe and 1524 Oe at AC electric field of 80 kV m(-1) with a frequency of 36 kHz. Interestingly, the CME coefficient of radially-poled composite structure exhibits a saturation behavior, while the CME coefficient for axially-poled structure is distinguished by a single peak. The difference in the response is attributed to the amount strain transduction due to the polarization direction.
机译：具有磁电耦合的复合多体材料的应用结构域在纳米，微观和宏观上进行了拓宽。通常，复合多体色材料由两个或多个压电材料层和磁致伸缩材料组成。反过来，更多应用中的多二分子的增殖伴随着通过进行理论，数值和实验研究来了解材料阶段，几何，粘合界面和阶段的影响来伴随着敏锐的关注。在该实验研究中，给出了焦点来利用压电相的偏振方向对复合同心PZT /三苯酚-D结构的整体逆磁电（CME）响应的影响。具体地，径向和轴向偏振的PZT环分别同心地键合到两个萜卷-D环的外表面上。结果发现，当在34kHz，80kV M（-1）电场和784 OE偏置磁场测试时，轴向极化​​配置的最大近的谐振，轴向极化​​配置的CME系数是443mg V-1。另一方面，径向恒定构造的近共振CME值在281.9处保持几乎恒定。 +/-。 532 OE的偏置磁场和80kV m（-1）的AC电场的1524 OE之间的5.3 mg V-1，频率为36 kHz。有趣的是，径向抛光复合结构的C​​ME系数表现出饱和行为，而轴向极化结构的CME系数由单个峰值区分。响应的差异归因于由于偏振方向引起的量应变转换。

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