Non-reciprocal voltage–current and impedance gyration effects in ferrite/piezoelectric toroidal magnetoelectric composites
Non-reciprocal voltage–current and impedance gyration effects in ferrite/piezoelectric toroidal magnetoelectric composites
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DOI：
10.1063/5.0038722
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发表时间：
2021-01
影响因子：
4
通讯作者：
Jitao Zhang;Bingfeng Ge;Qingfang Zhang;D. Filippov;Jie Wu;Jiagui Tao;Zicheng Jia;Liying Jiang;Lingzhi Cao;G. Srinivasan
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文献类型：
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作者：
Jitao Zhang;Bingfeng Ge;Qingfang Zhang;D. Filippov;Jie Wu;Jiagui Tao;Zicheng Jia;Liying Jiang;Lingzhi Cao;G. Srinivasan
研制了一种由环形铁氧体/压电复合材料和线圈组成的紧凑、高效、无源磁电回转器，并对其非互易V-I/I-V和双向阻抗转换特性进行了系统表征。当电流密度为48.4 μW/cm ~ 3时，最佳电流密度为65 Ω，输出功率达到最大值2.59 μW;当电流密度为10 μW/cm ~ 3时，电流密度为10 μW/cm ~ 3时，电流密度为10 μW/cm ~当RL = 260 Ω，输入电压为32.3 μW/cm ~ 3时，输出功率最大，为1.4mA/V，最大输出功率为0.83 μW。相应地，实现了31 pF/Ω和0.37 μH/Ω的电阻控制电容/电感可调谐性。与传统的矩形ME回转器相比，环形ME回转器由于其较低的形状诱导各向异性、接近零的退磁效应和闭合磁路而具有期望的电磁干扰（EMI）容限。这些发现提供了更大的灵活性的设备设计的高效和紧凑的电力电子设备部署的情况下，在更高的频率下，需要较低的EMI。
A compact, efficient, and passive magnetoelectric (ME) gyrator consisting of a toroidal ferrite/piezoelectric composite and coil was developed, and its non-reciprocal V–I/I–V and bidirectional impedance conversion properties were systemically characterized. When a maximum V/I coefficient of 115 V/A over RL > 10 kΩ was obtained for the direct ME effect configuration, the output power reaches its maximum of 2.59 μW for optimum RL = 65 Ω at a constant input density of 48.4 μW/cm3, and when an inverse I/V coefficient was obtained, the output power reaches its maximum at 1.4 mA/V and 0.83 μW under optimum RL = 260 Ω and a constant input of 32.3 μW/cm3. Correspondingly, resistance-controlled capacitive/inductance tunabilities of 31 pF/Ω and 0.37 μH/Ω were achieved. Compared to traditional rectangular ME gyrators, the toroidal one has desired electromagnetic interference (EMI) tolerances due to its lower shape-induced anisotropy, near-zero demagnetization effects, and closed magnetic circuit. These findings provided more flexibility of the device design for efficient and compact power electronics deployed in circumstances where the lower EMI at higher frequencies was required.