Hexagonal ferrite‐piezoelectric composites for dual magnetic and electric field tunable 8–25 GHz microstripline resonators and phase shifters

Abstract

Microwave magnetoelectric (ME) effects over 8–25 GHz have been studied in bilayers of single crystal Y‐type hexagonal ferrite Ba2Zn2Fe12O22 and polycrystalline lead zirconate titanate (PZT) or single crystal lead magnesium niobate–lead titanate (PMN–PT). The bilayers are made by epoxy bonding or eutecting bonding the ferrite and piezoelectric. The strength of ME interactions A has been measured from data on electric field E tuning of magnetic modes in the ferrite. The electric field produces a mechanical deformation in the piezoelectric and results in a shift in the ferromagnetic resonance. Bilayers of ferrite/PMN–PT have A = 10 MHz cm/kOe and is an order of magnitude higher than for ferrite‐PZT. The ferrite/PMN–PT resonators could be tuned by 120 MHz with E = 12 kV/cm. Data on differential phase shift versus E indicate a differential phase shift of 50° for E = 12 kV/cm, a linear variation in the phase shift with E and an insertion loss of 4–8 dB. The bilayers are of interest for 8–25 GHz dual E‐ and H‐tunable ferrite resonators and phase shifters. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1215–1218, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26793

Status and Perspectives of Multiferroic Magnetoelectric Composite Materials and Applications

“…Tatarenko et al [131] reported the converse ME effect over the [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] GHz range in bilayers of single crystal ZnY and polycrystalline PZT or single crystal PMN-PT. The resonator was tuned by 120 MHz with E = 12 kV/cm, and corresponding ME coupling strength A was about 10 MHz cm/kOe.…”

Voltage‐Impulse‐Induced Non‐Volatile Ferroelastic Switching of Ferromagnetic Resonance for Reconfigurable Magnetoelectric Microwave Devices

“…This requires the creation of novel materials and functionalities, while integrating into non‐volatile electronic devices 8–12. Multiferroic heterostructures,13, 7, 14–24 exhibiting strong strain‐mediated magnetoelectric (ME) coupling between distinct ferromagnetic and ferroelectric phases, have shown great promise for frequency agile microwave applications 25, 1, 3–4, 26–29. In these materials, a single control parameter of voltage‐induced piezo‐strain, arising from ferroelectrics, is used to in situ introduce an effective magnetic anisotropy26, 30–37 and subsequent FMR frequency shift, in elastically‐coupled ferromagnetic phases via the magnetoelastic effect 6, 33, 38–42.…”

“…Therefore, devices based upon such materials are, in principle, light‐weight, fast, and energy efficient, therefore overcoming some of the intrinsic limitations in conventional microwave components in addition to providing new functionality. In most prototype ME microwave devices such as tunable filters,43 resonators,39 and phase shifters,29 tuning of FMR frequency has been achieved through the use of a linear piezo response, whereby the strain is directly proportional to the applied voltage, without electric polarization switching 44. Upon removing the electric field, the FMR decays to the initial state 27, 44.…”

新型多铁层合异质结及其在可调微波器件中的应用

“…当电场由-3 kV/cm 增加到 6 kV/cm 时, 可在 [24,58~61] . 这些器件是利用 铁氧体中静磁自旋波(MSW)的传递来工作的 [62,63] , [24,36,64] . Tatarenko 等 人 [24] 构建了 YIG/PZT 磁电可调移相器, 利用电压调 图 6 (网络版彩色)基于多铁异质结的移相器 [24] (a) 磁电微波移相器的原理图, 其由 YIG/PZT 磁电谐振器和微带传感器组成; (b) 施加电场 E= 0 和 7.5 kV/cm 时, 相位角随频率的变化 关系, 插图显示了相位移随电场的变化关系…”