Magnetoelectric microwave bandpass filter

Татаренко, А. С.; Gheevarughese, V.; Srinivasan, G.

doi:10.1049/el:20060167

Cited by 100 publications

(72 citation statements)

References 6 publications

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“…[1][2][3][4][5][6][7][8][9] Multiferroic composites consisting of ferro/ferrimagnetic and ferroelectric phases are widely recognized to be able to realize electric field control of magnetic order due to its strong strain mediated magnetoelectric ͑ME͒ coupling resulting from the inversed piezoelectric effect and piezomagnetic effect. [10][11][12][13][14][15][16][17][18][19] Several multiferroic heterostructures have been known to show large electrical field manipulation of magnetism, such as FeGaB/Si/PMN-PT ͑lead magnesium niobate-lead titanate͒, yttrium iron garnet ͑YIG͒/PMN-PT and YIG/BSTO ͑barium strontium titanate͒, 8,10,11,20,21 which show great prospects for E-field tunable magnetic devices. However, the tunable ranges of most demonstrated microwave multiferroic devices are still quite limited.…”

Section: Introductionmentioning

confidence: 99%

Electrical tuning of magnetism in Fe3O4/PZN–PT multiferroic heterostructures derived by reactive magnetron sputtering

Liu¹,

Obi²,

Cai³

et al. 2010

Journal of Applied Physics

133

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Strong magnetoelectric ͑ME͒ coupling was demonstrated in Fe 3 O 4 /PZN-PT ͑lead zinc niobate-lead titanate͒ multiferroic heterostructures obtained through a sputter deposition process. The dependence of the magnetic anisotropy on the electric field ͑E-field͒ is theoretically predicted and experimentally observed by ferromagnetic resonance spectroscopy. A large tunable in-plane magnetic anisotropy of up to 600 Oe, and tunable out-of-plane anisotropy of up to 400 Oe were observed in the Fe 3 O 4 /PZN-PT multiferroic heterostructures, corresponding to a large ME coefficient of 100 Oe cm/ kV in plane and 68 Oe cm/ kV out of plane, which match well with predicted results. In addition, the electric field manipulation of magnetic anisotropy is also demonstrated by the electric fields dependence of magnetic hysteresis loops, showing a large squareness ratio change of 44%. These Fe 3 O 4 /PZN-PT multiferroic heterostructures exhibiting large E-field tunable magnetic properties provide great opportunities for novel electrostatically tunable multiferroic devices.

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Section: Introductionmentioning

confidence: 99%

Electrical tuning of magnetism in Fe3O4/PZN–PT multiferroic heterostructures derived by reactive magnetron sputtering

Liu¹,

Obi²,

Cai³

et al. 2010

Journal of Applied Physics

133

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“…[20][21][22][23][24][25][26] One important series of such multiferroic devices is the electrostatically tunable microwave multiferroic signal processing devices, including tunable resonators, 24 phase shifters, 25 and tunable filters. 27 Compared to conventional tunable microwave magnetic devices that are tuned by magnetic field, these electrostatically tunable microwave multiferroic devices are much more energy efficient, less noisy, compact, and light-weight. The magneto electric effect can be realized in multiferroic composites through a strain/stress mediated interaction [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] which enables effective energy transfer between electric and magnetic fields and leads to important new functionalities and new devices.…”

Section: Multiferroic Thin Film Devicesmentioning

confidence: 99%

“…27 Compared to conventional tunable microwave magnetic devices that are tuned by magnetic field, these electrostatically tunable microwave multiferroic devices are much more energy efficient, less noisy, compact, and light-weight. The magneto electric effect can be realized in multiferroic composites through a strain/stress mediated interaction [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] which enables effective energy transfer between electric and magnetic fields and leads to important new functionalities and new devices. A key component for reconfigurable RF/microwave electronics is a voltage tunable inductor.…”

Section: Multiferroic Thin Film Devicesmentioning

confidence: 99%

“…Unlike the situation when magnetic fields are used for such tuning, the voltage tuning process is fast, and power efficient as the biasing voltages involve minimal currents and are nearly passive. This process has been demonstrated in voltage tunable bandpass filters, 27 voltage tunable bandstop filters, 26 voltage tunable delay lines, 93 and voltage tunable inductors. 23 Figure 30 shows the schematic of such a voltage tunable ferromagnetic resonance based tunable bandstop filter.…”

Section: Voltage Tunable Magneto-electric Rf/microwave/millimeter Wavmentioning

confidence: 99%

“…The focus need to be on three classes of multiferroic RF/microwave/millimeter devices based on converse ME coupling, (1) those based on the voltage tuning of the FMR response, (2) those based on hybrid spin-wave electromagnetic wave tuning, and (3) those based on voltage tunable permeability. Class 1 devices could include tunable band pass and bandstop filters, 26,27 for example. Class 2 devices could include spin-wave delay lines, spin-wave soliton pulse cloning devices, 22 and broadband chaos microwave signal generators, 29 among others.…”

Section: Voltage Tunable Magneto-electric Rf/microwave/millimeter Wavmentioning

confidence: 99%

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Challenges and opportunities for multi-functional oxide thin films for voltage tunable radio frequency/microwave components

Subramanyam¹,

Cole²,

Sun³

et al. 2013

Journal of Applied Physics

147

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There has been significant progress on the fundamental science and technological applications of complex oxides and multiferroics. Among complex oxide thin films, barium strontium titanate (BST) has become the material of choice for room-temperature-based voltage-tunable dielectric thin films, due to its large dielectric tunability and low microwave loss at room temperature. BST thin film varactor technology based reconfigurable radio frequency (RF)/microwave components have been demonstrated with the potential to lower the size, weight, and power needs of a future generation of communication and radar systems. Low-power multiferroic devices have also been recently demonstrated. Strong magneto-electric coupling has also been demonstrated in different multiferroic heterostructures, which show giant voltage control of the ferromagnetic resonance frequency of more than two octaves. This manuscript reviews recent advances in the processing, and application development for the complex oxides and multiferroics, with the focus on voltage tunable RF/microwave components. The over-arching goal of this review is to provide a synopsis of the current state-of the-art of complex oxide and multiferroic thin film materials and devices, identify technical issues and technical challenges that need to be overcome for successful insertion of the technology for both military and commercial applications, and provide mitigation strategies to address these technical challenges. V C 2013 AIP Publishing LLC.

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Strong Electric Field Tuning of Magnetism in Multiferroic Heterostructures

Liu

Lou

Obi

et al. 2009

Advances in Electronic Ceramics II

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E-field tuning of magnetism has become an exciting new frontier due to its wide range of potential applications in information storage, sensors, and novel electrostatically tunable microwave magnetic devices such as filters, resonators, inductors and phase shifters. Multiferroic composites, consisting of separate ferromagnetic and ferroelectric phases, have been utilized to electrically control magnetic order through strain mediated ME coupling resulting from the inversed electric effect and piezomagnetic effect. In this work, attempts of electrically tuning magnetism were made in nano-composites multiferroics and laminate multiferroic heterostructures. Remarkable Efield control of magnetism in laminate heterostructures was demonstrated, showing a record high E-field induced magnetic anisotropy, towards to realizing large tunable microwave device and spintronic devices. First, we attempt to demonstrate ME coupling in nano-composite multiferroics. One-dimensional multiferroic core (NiFe 2 O 4 ) -shell ( (Pb(Zr 0.52 Ti 0.48 )O 3 ) nanowire was firstly prepared by combining a modified sol-gel process, electrochemical deposition, and subsequent oxidization in anodized nanoporous alumina membranes. Well-defined individual multiferroic core-shell nanowire with clear boundary can be self-assembled under a certain magnetic field and patterned on the template for ME measurement. However, E-field tuning of magnetism in nano-composites is challenge due the large current leakage caused by small resistivity of magnetic phase. In addition, 0-3 type of CoFe 2 O 4 / PZT nano-composite was synthesized by modified Sol-Gel process. The ME coupling was demonstrated through spontaneous electric polarization change as applying a magnetic field. Second, Ni 0.23 Fe 2.77 O 4 (NFO) / PZT (lead zirconium tinatate), Ni 0.26 Zn 0.1 F e 2.63 O 4 (NZFO) / (011) cut PMN-PT, Zn 0 .1Fe 2 .9O 4 (ZFO) / (011) cut PMN-PT, Fe 3 O 4 /PZT, Fe 3 O 4 / (011) cut PMN-PT, and Fe 3 O 4 / (011) cut PZN-PT (lead zinc niobate-lead titanate) were prepared by spin-spray process at a low temperature of 90C. Strong magnetoelectric coupling (ME) and giant microwave tunability were demonstrated by a electrostatic field induced magnetic anisotropic field change in these heterostructures. A high electrostatically tunable ferromagnesim resonance (FMR) field shfit up to 600 Oe, corresponding to a large microwave ME coefficient of 67 Oe cm/kV, was observed in Fe 3 O 4 /PMN-PT heterostructures. A record-high electrostatically tunable FMR field range of 860 Oe with the linewidth of 330 to 380 Oe was demonstrated in Fe 3 O 4 /PZN-PT heterostructure, corresponding to a ME coefficient of 108 Oe cm/kV. Static ME interaction was also investigated and a maximum electric field induced squareness ratio change of 40% was observed in Fe 3 O 4 /PZN-PT. In I would like to express my sincere appreciation and gratitude to my advisor Prof. Nian X. Sun for his constant support, guidance and encouragement in the past four years. Without his support, this dissertation would not have been po...

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Magnetoelectric microwave bandpass filter

Cited by 100 publications

References 6 publications

Electrical tuning of magnetism in Fe3O4/PZN–PT multiferroic heterostructures derived by reactive magnetron sputtering

Electrical tuning of magnetism in Fe3O4/PZN–PT multiferroic heterostructures derived by reactive magnetron sputtering

Challenges and opportunities for multi-functional oxide thin films for voltage tunable radio frequency/microwave components

Strong Electric Field Tuning of Magnetism in Multiferroic Heterostructures

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